# Exim Internet Mailer

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## Chapter 63 - Concept Index

### Symbols

*@ with single-key lookup

  File and database lookups [Default values in single-key lookups], Domain, host, address, and local part lists [Address lists]

+caseful

  Domain, host, address, and local part lists [Case of letters in address lists], String expansions [Expansion conditions]

+defer_unknown

  Access control lists [Using DNS lists]

+exclude_unknown

  Access control lists [Using DNS lists]

+ignore_defer

  Domain, host, address, and local part lists [Temporary DNS errors when looking up host information]

+ignore_unknown

  Domain, host, address, and local part lists [Behaviour when an IP address or name cannot be found]

+include_defer

  Domain, host, address, and local part lists [Temporary DNS errors when looking up host information]

+include_unknown

  Domain, host, address, and local part lists [Behaviour when an IP address or name cannot be found], Access control lists [Using DNS lists]

.ifdef

  The Exim runtime configuration file [Conditional skips in the configuration file]

.include in configuration file

  The Exim runtime configuration file [File inclusions in the configuration file]

.include_if_exists in configuration file

  The Exim runtime configuration file [File inclusions in the configuration file]

.so building

  Building and installing Exim [Dynamically loaded lookup module support]

/dev/null

  The redirect router [Special items in redirection lists]

/etc/aliases

  Building and installing Exim [Installing Exim binaries and scripts]

/etc/mail/mailer.conf

  Building and installing Exim [Replacing another MTA with Exim]

/etc/passwd

  File and database lookups [passwd], Generic options for routers

  multiple reading of

    Main configuration [Alphabetical list of main options]

/etc/userdbshadow.dat

  File and database lookups [dbmnz]

4xx responses
  count of

    String expansions [Expansion variables]

  retry rules for

    Retry configuration [Choosing which retry rule to use for address errors]

  retrying after

    The smtp transport [Private options for smtp]

  to STARTTLS

    The smtp transport [Private options for smtp]

8-bit characters

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

8BITMIME

  Main configuration [Alphabetical list of main options], Log files [Reducing or increasing what is logged]

@ in a domain list

  The default configuration file [Main configuration settings], Domain, host, address, and local part lists [Domain lists]

@ in a host list

  Domain, host, address, and local part lists [Host list patterns that match by IP address]

@@ with single-key lookup

  Domain, host, address, and local part lists [Address lists]

@[] in a domain list

  Domain, host, address, and local part lists [Domain lists]

@[] in a host list

  Domain, host, address, and local part lists [Host list patterns that match by IP address]

@mx_any

  Domain, host, address, and local part lists [Domain lists]

@mx_primary

  Domain, host, address, and local part lists [Domain lists]

@mx_secondary

  Domain, host, address, and local part lists [Domain lists]

### A

A+
  in dnsdb lookup

    File and database lookups [Pseudo dnsdb record types]

ACL
  spf condition

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  spf_guess condition

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

ALPN
  general information

    Encrypted SMTP connections using TLS/SSL [ALPN]

  require negotiation in client

    The smtp transport [Private options for smtp]

  require negotiation in server

    Main configuration [Alphabetical list of main options]

  set acceptable names for server

    Main configuration [Alphabetical list of main options]

  set name in client

    The smtp transport [Private options for smtp]

AUTH
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  advertising

    Main configuration [Alphabetical list of main options]

  advertising when encrypted

    Main configuration [Alphabetical list of main options]

  configuration

    The Exim runtime configuration file [Configuration file format], The default configuration file [Authenticators configuration]

  description of

    SMTP authentication

  in external authenticator

    The external authenticator [Using external in a server]

  in plaintext authenticator

    The plaintext authenticator [Using plaintext in a server]

  logging

    Log files [Logging message reception]

  on MAIL command

    String expansions [Expansion variables], Main configuration [Alphabetical list of main options], SMTP authentication [The AUTH parameter on MAIL commands], SMTP authentication [Authentication by an Exim client]

  on bounce message

    Main configuration [Alphabetical list of main options]

  testing a server

    SMTP authentication [Testing server authentication]

  with PAM

    String expansions [Expansion conditions]

Athena

  Incorporated code

Authentication-Results: header line

  String expansions [Expansion items]

abandoning mail

  The Exim command line [Command line options], The redirect router [Special items in redirection lists]

accept ACL verb

  Access control lists [ACL verbs]

accept router

  The accept router

access control lists (ACLs)
  PRDR-related

    Main configuration [Alphabetical list of main options]

  arguments

    Access control lists [ACL conditions]

  at start of non-SMTP message

    Main configuration [Alphabetical list of main options]

  case of local part in

    Access control lists [Use of the control modifier]

  certificate verification

    Access control lists [ACL conditions]

  conditions; list of

    Access control lists [ACL conditions]

  conditions; processing

    Access control lists [Condition and modifier processing]

  customized test

    Access control lists [ACL conditions]

  cutthrough routing

    Access control lists [Use of the control modifier]

  data for message ACL

    Access control lists [Data for message ACLs]

  data for non-message ACL

    Access control lists [Data for non-message ACLs]

  default configuration

    The default configuration file [ACL configuration]

  description

    Access control lists

  enabling debug logging

    Access control lists [Use of the control modifier]

  finding which to use

    Access control lists [Finding an ACL to use]

  for non-SMTP messages

    Main configuration [Alphabetical list of main options]

  format of

    Access control lists [Format of an ACL]

  indirect

    Access control lists [ACL conditions]

  introduction

    How Exim receives and delivers mail [Policy control]

  modifiers; list of

    Access control lists [ACL modifiers]

  modifiers; processing

    Access control lists [Condition and modifier processing]

  nested

    Access control lists [ACL conditions]

  on SMTP connection

    Main configuration [Alphabetical list of main options]

  options for specifying

    Access control lists [Specifying when ACLs are used]

  per-user data processing

    Main configuration [Alphabetical list of main options]

  relay control

    Access control lists [Using an ACL to control relaying]

  return codes

    Access control lists [ACL return codes]

  rewriting addresses in

    Address rewriting [When does rewriting happen?]

  scanning for spam

    Access control lists [ACL conditions]

  scanning for viruses

    Access control lists [ACL conditions]

  setting DSCP value

    Access control lists [Use of the control modifier]

  setting up for SMTP commands

    Main configuration [Alphabetical list of main options]

  testing a DNS list

    Access control lists [ACL conditions], Access control lists [Using DNS lists]

  testing a TLS certificate

    Access control lists [ACL conditions]

  testing a local part

    Access control lists [ACL conditions]

  testing a recipient

    Access control lists [ACL conditions]

  testing a recipient domain

    Access control lists [ACL conditions]

  testing a sender

    Access control lists [ACL conditions]

  testing a sender domain

    Access control lists [ACL conditions]

  testing by regex matching

    Access control lists [ACL conditions], Access control lists [ACL conditions]

  testing for authentication

    Access control lists [ACL conditions]

  testing for encryption

    Access control lists [ACL conditions]

  testing the client host

    Access control lists [ACL conditions]

  testing, customized

    Access control lists [ACL conditions]

  unset options

    Access control lists [Unset ACL options]

  variables

    Access control lists [ACL variables]

  variables, handling unset

    Main configuration [Alphabetical list of main options]

  verbs, definition of

    Access control lists [Format of an ACL]

  verifying HELO/EHLO

    Access control lists [ACL conditions]

  verifying header names only ASCII

    Access control lists [ACL conditions]

  verifying header syntax

    Access control lists [ACL conditions]

  verifying host reverse lookup

    Access control lists [ACL conditions]

  verifying recipient

    Access control lists [ACL conditions]

  verifying sender

    Access control lists [ACL conditions]

  verifying sender in the header

    Access control lists [ACL conditions]

  virus scanning

    Access control lists [ACL conditions]

acl
  call from expansion

    String expansions [Expansion items]

  expansion condition

    String expansions [Expansion conditions]

acl ACL condition

  Access control lists [ACL conditions]

add_header ACL modifier

  Access control lists [Adding header lines in ACLs]

adding drivers

  Adding new drivers or lookup types

additional groups

  Generic options for routers, Generic options for transports

address
  constructed

    Message processing [Constructed addresses]

  copying routing

    The dnslookup router [Private options for dnslookup], The manualroute router [Private options for manualroute]

  qualification

    Main configuration [Alphabetical list of main options], Message processing [Unqualified addresses]

  rewriting

    see "rewriting"

  sender

    The Exim command line [Command line options]

  source-routed

    Main configuration [Alphabetical list of main options]

  testing

    The Exim command line [Command line options], Generic options for routers

  verification

    The Exim command line [Command line options]

  without domain

    Introduction [Limitations]

address duplicate, discarding

  How Exim receives and delivers mail [Duplicate addresses], The redirect router [Duplicate addresses]

address expansion item

  String expansions [Expansion operators]

address list
  @@ lookup type

    Domain, host, address, and local part lists [Address lists]

  case forcing

    Domain, host, address, and local part lists [Case of letters in address lists]

  empty item

    Domain, host, address, and local part lists [Address lists]

  in a rewriting pattern

    Address rewriting [Rewriting patterns]

  in expansion condition

    String expansions [Expansion conditions]

  local part starting with !

    Domain, host, address, and local part lists [Address lists]

  lookup for complete address

    Domain, host, address, and local part lists [Address lists]

  patterns

    Domain, host, address, and local part lists [Address lists]

  regular expression in

    Domain, host, address, and local part lists [Address lists]

  split local part and domain

    Domain, host, address, and local part lists [Address lists]

address qualification, suppressing

  The Exim command line [Command line options]

address redirection
  broken files

    The redirect router [Private options for the redirect router]

  disabling rewriting

    The redirect router [Private options for the redirect router]

  domain; preserving

    The redirect router [Private options for the redirect router]

  errors

    The redirect router [Errors in redirection lists]

  included external list

    The redirect router [Special items in redirection lists]

  local part without domain

    The redirect router [Redirecting to a local mailbox]

  non-filter list items

    The redirect router [Items in a non-filter redirection list]

  one-time expansion

    The redirect router [Private options for the redirect router]

  redirect router

    The redirect router

  repeated for each delivery attempt

    The redirect router [Repeated redirection expansion]

  to black hole

    The redirect router [Special items in redirection lists]

  to file

    The redirect router [Special items in redirection lists]

  to local mailbox

    The redirect router [Redirecting to a local mailbox]

  to pipe

    The redirect router [Special items in redirection lists]

  while verifying

    The redirect router [Forward files and address verification], Access control lists [Redirection while verifying]

addresses expansion item

  String expansions [Expansion operators]

admin user

  Main configuration [Alphabetical list of main options], The Exim monitor [Running the monitor], Security considerations [Privileged users]

  definition of

    The Exim command line [Trusted and admin users]

affix
  filter testing

    The Exim command line [Command line options], The Exim command line [Command line options]

  router precondition

    How Exim receives and delivers mail [Router preconditions], How Exim receives and delivers mail [Router preconditions], Generic options for routers

  variables

    String expansions [Expansion variables]

alias file
  backslash in

    The redirect router [Redirecting to a local mailbox]

  broken

    The redirect router [Private options for the redirect router]

  building

    The Exim command line [Setting options by program name], The Exim command line [Command line options]

  exception to default

    The redirect router [Special items in redirection lists]

  in a redirect router

    The redirect router

  one-time expansion

    The redirect router [Private options for the redirect router]

  ownership

    The redirect router [Private options for the redirect router]

  per-domain default

    File and database lookups [Default values in single-key lookups]

alias for host

  Domain, host, address, and local part lists [Host list patterns that match by host name]

alternate configuration file

  The Exim command line [Command line options]

and expansion condition

  String expansions [Combining expansion conditions]

angle brackets, excess

  Main configuration [Alphabetical list of main options]

appendfile
  tainted data

    The appendfile transport [The file and directory options]

appendfile transport

  The appendfile transport

appending to a file

  The appendfile transport [Operational details for appending]

asterisk
  after IP address

    SMTP processing [Outgoing SMTP and LMTP over TCP/IP], Log files [Logging deliveries]

  in address list

    Domain, host, address, and local part lists [Address lists]

  in domain list

    Domain, host, address, and local part lists [Domain lists]

  in host list

    Domain, host, address, and local part lists [Special host list patterns], Domain, host, address, and local part lists [Host list patterns that match by host name]

  in lookup type

    Domain, host, address, and local part lists [Domain lists]

  in search type

    File and database lookups [Partial matching in single-key lookups]

authenticated ACL condition

  Access control lists [ACL conditions]

authentication

  SMTP authentication

  ACL checking

    Access control lists [ACL conditions]

  ANONYMOUS

    The gsasl authenticator, The gsasl authenticator [gsasl auth variables]

  CRAM-MD5

    The cram_md5 authenticator, The gsasl authenticator

  Client Certificate

    The external authenticator, The tls authenticator

  DIGEST-MD5

    The gsasl authenticator

  EXTERNAL

    The gsasl authenticator, The gsasl authenticator [gsasl auth variables]

  GNU SASL

    The gsasl authenticator

  GSSAPI

    The gsasl authenticator [gsasl auth variables], The heimdal_gssapi authenticator

  Kerberos

    The heimdal_gssapi authenticator

  LOGIN

    The plaintext authenticator [The LOGIN authentication mechanism], The gsasl authenticator

  Microsoft Secure Password

    The spa authenticator

  NTLM

    The spa authenticator

  PLAIN

    The plaintext authenticator [The PLAIN authentication mechanism], The gsasl authenticator

  SASL

    The gsasl authenticator

  SCRAM family

    The gsasl authenticator

  X509

    The external authenticator, The tls authenticator

  advertising

    Main configuration [Alphabetical list of main options]

  bounce message

    Main configuration [Alphabetical list of main options]

  expansion item

    String expansions [Expansion items], String expansions [Expansion variables], SMTP authentication [Authentication on an Exim server], DKIM, SPF, SRS and DMARC [Verifying DKIM signatures in incoming mail], DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  fail

    String expansions [Expansion variables]

  failure

    String expansions [Expansion variables]

  failure event, client

    SMTP authentication [Authentication by an Exim client]

  failure event, server

    SMTP authentication [Authentication on an Exim server]

  generic options

    SMTP authentication [Generic options for authenticators]

  id

    String expansions [Expansion variables]

  id, specifying for local message

    The Exim command line [Command line options]

  logging

    Log files [Logging message reception]

  name, specifying for local message

    The Exim command line [Command line options]

  on an Exim client

    SMTP authentication [Authentication by an Exim client]

  on an Exim server

    SMTP authentication [Authentication on an Exim server]

  optional in client

    The smtp transport [Private options for smtp]

  required by client

    The smtp transport [Private options for smtp]

  results header

    String expansions [Expansion items]

  sender

    String expansions [Expansion variables]

  sender, specifying for local message

    The Exim command line [Command line options]

  sender; authenticated

    SMTP authentication [The AUTH parameter on MAIL commands]

  testing a server

    SMTP authentication [Testing server authentication]

  to proxy

    Proxies [Outbound proxies]

authenticators
  cram_md5

    The cram_md5 authenticator

  cyrus_sasl

    The cyrus_sasl authenticator

  dovecot

    The dovecot authenticator

  external

    The external authenticator

  gsasl

    The gsasl authenticator

  heimdal_gssapi

    The heimdal_gssapi authenticator

  plaintext

    The plaintext authenticator

  spa

    The spa authenticator

  tls

    The tls authenticator

autoreply transport

  The autoreply transport

  for system filter

    Main configuration [Alphabetical list of main options]

### B

BATV, verifying

  Access control lists [Bounce address tag validation]

BDAT
  SMTP command

    The smtp transport [Private options for smtp], Access control lists [The DATA ACLs]

BIN_DIRECTORY

  Building and installing Exim [Installing Exim binaries and scripts]

BSD, DBM library for

  Building and installing Exim [DBM libraries]

Bcc: header line

  The Exim command line [Command line options], Message processing [Bcc:]

Berkeley DB library

  Building and installing Exim [DBM libraries]

  file format

    File and database lookups [dbm]

Bounce Address Tag Validation

  see "BATV"

Bugzilla

  Introduction [FTP site and websites]

background delivery

  The Exim command line [Command line options]

backlog of connections

  Main configuration [Alphabetical list of main options]

backslash in alias file

  The redirect router [Redirecting to a local mailbox]

bang paths
  not handled by Exim

    Introduction [Limitations]

  rewriting

    Address rewriting [Rewriting examples]

banner for SMTP

  Main configuration [Alphabetical list of main options]

base32 expansion item

  String expansions [Expansion operators]

base32d expansion item

  String expansions [Expansion operators]

base36

  How Exim receives and delivers mail [Message identification]

base62

  How Exim receives and delivers mail [Message identification], The appendfile transport [Private options for appendfile]

base62 expansion item

  String expansions [Expansion operators]

base62d expansion item

  String expansions [Expansion operators]

base64 decoding
  in string expansion

    String expansions [Expansion operators]

base64 encoding
  conversion from hex

    String expansions [Expansion operators]

  creating authentication test data

    SMTP authentication [Testing server authentication]

  functions for local_scan() use

    Adding a local scan function to Exim [Available Exim functions]

  in encrypted password

    String expansions [Expansion conditions]

  in external authenticator

    The external authenticator [Using external in a server]

  in header lines

    String expansions [Expansion items]

  in plaintext authenticator

    The plaintext authenticator [Using plaintext in a server]

  in string expansion

    String expansions [Expansion operators]

base64 expansion item

  String expansions [Expansion operators]

base64d expansion item

  String expansions [Expansion operators]

batched SMTP input

  The Exim command line [Command line options], SMTP processing [Incoming batched SMTP]

batched SMTP output

  SMTP processing [Outgoing batched SMTP]

batched SMTP output example

  The manualroute router [Manualroute examples]

batched local delivery

  Address batching in local transports

bcc recipients, verifying none

  Access control lists [ACL conditions]

binary zero
  in RFC 2047 decoding

    Adding a local scan function to Exim [Available Exim functions]

  in authentication data

    SMTP authentication [Testing server authentication]

  in header line

    String expansions [Expansion items]

  in lookup key

    File and database lookups [cdb], File and database lookups [dbm], File and database lookups [dbmnz], File and database lookups [nis], Exim utilities [Making DBM files (exim_dbmbuild)]

  in message body

    String expansions [Expansion variables], String expansions [Expansion variables]

  in plaintext authenticator

    The plaintext authenticator [Using plaintext in a server], The plaintext authenticator [The PLAIN authentication mechanism]

bind IP address

  The smtp transport [Private options for smtp]

black hole

  The redirect router [Special items in redirection lists]

black list (DNS)

  String expansions [Expansion variables], Access control lists [ACL conditions], Access control lists [Using DNS lists], Log files [Reducing or increasing what is logged]

body of message
  binary zero count

    String expansions [Expansion variables]

  definition of

    Introduction [Terminology]

  expansion variable

    String expansions [Expansion variables], String expansions [Expansion variables]

  line count

    String expansions [Expansion variables]

  size

    String expansions [Expansion variables]

  transporting

    Generic options for transports

  visible size

    Main configuration [Alphabetical list of main options]

books about Exim

  Introduction [Exim documentation]

bool expansion condition

  String expansions [Expansion conditions]

bool_lax expansion condition

  String expansions [Expansion conditions]

boolean configuration values

  The Exim runtime configuration file [Boolean options]

bounce message
  Reply-to: in

    Main configuration [Alphabetical list of main options]

  copy to other address

    Main configuration [Alphabetical list of main options]

  customizing

    Main configuration [Alphabetical list of main options], Customizing bounce and warning messages [Customizing bounce messages]

  definition of

    Introduction [Terminology]

  discarding

    Main configuration [Alphabetical list of main options]

  failure to deliver

    How Exim receives and delivers mail [Failures to deliver bounce messages]

  generating

    The Exim command line [Command line options]

  including body

    Main configuration [Alphabetical list of main options]

  including original

    Main configuration [Alphabetical list of main options]

  line length limit

    Main configuration [Alphabetical list of main options]

  recipient of

    How Exim receives and delivers mail [Permanent delivery failure]

  redirection details; suppressing

    The redirect router [Private options for the redirect router]

  sender authentication

    Main configuration [Alphabetical list of main options]

  size limit

    Main configuration [Alphabetical list of main options]

  when generated

    How Exim receives and delivers mail [Permanent delivery failure]

bounce messages
  From: line, specifying

    Main configuration [Alphabetical list of main options]

  success

    Main configuration [Alphabetical list of main options]

bounce_message_file
  tainted data

    Main configuration [Alphabetical list of main options]

broken alias or forward files

  The redirect router [Private options for the redirect router]

bug reports

  Introduction [Bug reports]

build directory

  Building and installing Exim [The building process]

build-time options, overriding

  Building and installing Exim [Overriding build-time options for Exim]

building DBM files

  Exim utilities [Making DBM files (exim_dbmbuild)]

building Exim

  Building and installing Exim

  OS-specific C header files

    Building and installing Exim [OS-specific header files]

  architecture type

    Building and installing Exim [Overriding build-time options for Exim]

  multiple OS/architectures

    Building and installing Exim [Multiple machine architectures and operating systems]

  operating system type

    Building and installing Exim [Overriding build-time options for Exim]

  overriding default settings

    Building and installing Exim [Overriding build-time options for Exim]

  pre-building configuration

    Building and installing Exim [Pre-building configuration]

building Eximon

  Building and installing Exim [Overriding build-time options for the monitor]

building alias file

  The Exim command line [Command line options]

### C

CA bundle
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

CHUNKING
  BDAT command

    Access control lists [The DATA ACLs]

  advertisement

    Main configuration [Alphabetical list of main options]

  enabling, in client

    The smtp transport [Private options for smtp]

CIDR notation

  Domain, host, address, and local part lists [Host list patterns that match by IP address], String expansions [Expansion operators]

CONFIGURE_FILE

  Building and installing Exim [Installing Exim binaries and scripts], The Exim command line [Command line options], The Exim runtime configuration file

CONFIGURE_GROUP

  The Exim runtime configuration file

CONFIGURE_OWNER

  The Exim runtime configuration file

CR character

  see "carriage return"

CRAM-MD5 authentication mechanism

  The cram_md5 authenticator

CRL

  see "certificate revocation list"

CSA
  in dnsdb lookup

    File and database lookups [Pseudo dnsdb record types]

  verifying

    Access control lists [Client SMTP authorization (CSA)]

CSA verification

  Access control lists [ACL conditions]

Cc: header line

  The Exim command line [Command line options]

Certificate-based authentication

  The external authenticator, The tls authenticator

Client SMTP Authorization

  see "CSA"

Courier

  File and database lookups [dbmnz]

Cygwin

  How Exim receives and delivers mail [Message identification]

Cyrus

  Incorporated code, String expansions [Expansion conditions], String expansions [Expansion conditions], The pipe transport [Private options for pipe], The pipe transport [Using an external local delivery agent], The smtp transport [Private options for smtp]

  SASL library

    The cyrus_sasl authenticator

caching
  callout

    Access control lists [Callout caching]

  callout timeouts

    Main configuration [Alphabetical list of main options]

  certificate

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  certificate authorities

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  ciphers

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  crl

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  lookup data

    File and database lookups [Lookup caching]

  named lists

    Domain, host, address, and local part lists [Named list caching]

  ocsp

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items]

  of dns lookup

    File and database lookups [Dnsdb lookup modifiers], Access control lists [Using DNS lists]

  privatekey

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  quota

    Access control lists [Quota caching]

caching callout, suppressing

  Access control lists [Additional parameters for callouts]

callout
  additional parameters for

    Access control lists [Additional parameters for callouts]

  cache, description of

    Access control lists [Callout caching]

  cache, suppressing

    Access control lists [Additional parameters for callouts]

  caching timeouts

    Main configuration [Alphabetical list of main options]

  connection timeout, specifying

    Access control lists [Additional parameters for callouts]

  defer, action on

    Access control lists [Additional parameters for callouts]

  full postmaster check

    Access control lists [Additional parameters for callouts]

  overall timeout, specifying

    Access control lists [Additional parameters for callouts]

  postmaster; checking

    Access control lists [Additional parameters for callouts]

  random check

    Access control lists [Additional parameters for callouts]

  sender for recipient check

    Access control lists [Additional parameters for callouts]

  sender when verifying header

    Access control lists [Additional parameters for callouts]

  timeout, specifying

    Access control lists [Additional parameters for callouts]

  verification

    Access control lists [Callout verification]

carriage return

  The appendfile transport [Private options for appendfile], The pipe transport [Private options for pipe], Message processing [Line endings], SMTP processing [Outgoing SMTP and LMTP over TCP/IP], SMTP processing [Incoming SMTP messages over TCP/IP]

case forcing in address lists

  Domain, host, address, and local part lists [Case of letters in address lists]

case forcing in strings

  String expansions [Expansion operators], String expansions [Expansion operators]

case of local parts

  How Exim receives and delivers mail [Duplicate addresses], Domain, host, address, and local part lists [Case of letters in address lists], Generic options for routers, Access control lists [Use of the control modifier], Message processing [Case of local parts]

case sensitivity
  in (n)wildlsearch lookup

    File and database lookups [(n)wildlsearch]

  in lsearch lookup

    File and database lookups [lsearch]

cdb
  acknowledgment

    Incorporated code

  description of

    File and database lookups [cdb]

  including support for

    Building and installing Exim [Overriding build-time options for Exim]

certextract
  certificate fields

    String expansions [Expansion items]

certificate
  base64 of DER

    String expansions [Expansion operators]

  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

  client, location of

    The smtp transport [Private options for smtp]

  directory for LDAP

    Main configuration [Alphabetical list of main options]

  extracting fields

    String expansions [Expansion items], String expansions [Expansion variables]

  file for LDAP

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  fingerprint

    String expansions [Expansion operators], String expansions [Expansion operators], String expansions [Expansion operators]

  key for LDAP

    Main configuration [Alphabetical list of main options]

  references to discussion

    Encrypted SMTP connections using TLS/SSL [Certificates and all that]

  revocation list

    Encrypted SMTP connections using TLS/SSL [Revoked certificates]

  revocation list for client

    The smtp transport [Private options for smtp]

  revocation list for server

    Main configuration [Alphabetical list of main options]

  self-signed

    Encrypted SMTP connections using TLS/SSL [Self-signed certificates]

  server, location of

    Main configuration [Alphabetical list of main options]

  variables

    String expansions [Expansion variables]

  verification of client

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Encrypted SMTP connections using TLS/SSL [Requesting and verifying client certificates], Access control lists [ACL conditions]

  verification of server

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

certificate authorities
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

change log

  Introduction [Exim documentation]

checking access

  Exim utilities [Checking access policy (exim_checkaccess)]

checking disk space

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

cipher
  logging

    Encrypted SMTP connections using TLS/SSL [Configuring an Exim server to use TLS], Encrypted SMTP connections using TLS/SSL [Configuring an Exim client to use TLS]

  requiring specific

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

ciphers
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

class resources (BSD)

  The pipe transport [Private options for pipe]

client, non-queueing

  Using Exim as a non-queueing client

command line
  addresses with -t

    Main configuration [Alphabetical list of main options]

  options

    The Exim command line

common option syntax

  The Exim runtime configuration file [Common option syntax]

compiler
  requirements

    Building and installing Exim [Multiple machine architectures and operating systems]

  version

    Building and installing Exim [Multiple machine architectures and operating systems]

concurrent deliveries

  Environment for running local transports [Concurrent deliveries]

condition ACL condition

  Access control lists [ACL conditions]

configuration file
  alternate

    The Exim command line [Command line options], The Exim runtime configuration file [Using a different configuration file]

  common option syntax

    The Exim runtime configuration file [Common option syntax]

  conditional skips

    The Exim runtime configuration file [Conditional skips in the configuration file]

  default walk through

    The default configuration file

  editing

    Building and installing Exim [Overriding build-time options for Exim]

  errors in

    The Exim runtime configuration file

  format of

    The Exim runtime configuration file [Configuration file format]

  general description

    The Exim runtime configuration file

  including other files

    The Exim runtime configuration file [File inclusions in the configuration file]

  leading white space in

    The Exim runtime configuration file [Configuration file format]

  macros

    The Exim runtime configuration file [Macros in the configuration file]

  main section

    Main configuration

  ownership

    The Exim runtime configuration file

  retry section

    Retry configuration

  trailing white space in

    The Exim runtime configuration file [Configuration file format]

configuration for building Exim

  Building and installing Exim [Pre-building configuration]

configuration options
  extracting

    The Exim command line [Command line options]

  hiding value of

    The Exim command line [Command line options], The Exim runtime configuration file [Common option syntax]

connection backlog
  monitoring

    Main configuration [Alphabetical list of main options]

  set maximum

    Main configuration [Alphabetical list of main options]

constructed address

  Message processing [Constructed addresses]

content scanning
  AV scanner failure

    String expansions [Expansion variables]

  MIME parts

    Content scanning at ACL time [Scanning MIME parts]

  at ACL time

    Content scanning at ACL time

  for spam

    Content scanning at ACL time [Scanning with SpamAssassin and Rspamd]

  for viruses

    Content scanning at ACL time [Scanning for viruses]

  per user

    Generic options for transports

  specifying at build time

    Building and installing Exim [Pre-building configuration]

  the malware condition

    Content scanning at ACL time [Scanning for viruses]

  with regular expressions

    Content scanning at ACL time [Scanning with regular expressions]

continue ACL modifier

  Access control lists [ACL modifiers]

control ACL modifier

  Access control lists [ACL modifiers], Access control lists [Use of the control modifier]

control of incoming mail

  Access control lists

copy of bounce message

  Main configuration [Alphabetical list of main options]

copy of message (unseen option)

  Generic options for routers []

correction of invalid utf-8 sequences in strings

  String expansions [Expansion operators]

cram_md5 authenticator

  The cram_md5 authenticator

creating directories

  The appendfile transport

crl
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

crypt()

  String expansions [Expansion conditions]

crypt16()

  String expansions [Expansion conditions]

crypteq expansion condition

  String expansions [Expansion conditions]

current directory for local transport

  Generic options for routers [], Environment for running local transports [Current and home directories]

customizing
  ACL condition

    Access control lists [ACL conditions]

  Received: header

    Main configuration [Alphabetical list of main options]

  SMTP banner

    Main configuration [Alphabetical list of main options]

  batching condition

    Address batching in local transports

  bounce message

    Main configuration [Alphabetical list of main options], Customizing bounce and warning messages [Customizing bounce messages]

  cannot route message

    Generic options for routers

  failure message

    The redirect router [Special items in redirection lists]

  input scan using C function

    Adding a local scan function to Exim

  precondition

    How Exim receives and delivers mail [Router preconditions]

  version number

    Main configuration [Alphabetical list of main options]

  warning message

    Main configuration [Alphabetical list of main options], Customizing bounce and warning messages [Customizing warning messages]

cutthrough
  logging

    Log files [Logging deliveries]

  requesting

    Access control lists [Use of the control modifier]

cycling logs

  Log files [Logging to local files that are periodically cycled], Exim utilities [Cycling log files (exicyclog)]

cyrus_sasl authenticator

  The cyrus_sasl authenticator

### D

DANE

  Encrypted SMTP connections using TLS/SSL [DANE]

  TLS ciphers

    The smtp transport [Private options for smtp]

  attempting for certain servers

    The smtp transport [Private options for smtp]

  logging

    Log files [Reducing or increasing what is logged]

  reporting

    Encrypted SMTP connections using TLS/SSL [Observability]

  requiring for certain servers

    The smtp transport [Private options for smtp]

  transport options

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

DATA
  ACL for

    Main configuration [Alphabetical list of main options]

  ACLs for

    Access control lists [Specifying when ACLs are used], Access control lists [The DATA ACLs]

  PRDR ACL for

    Main configuration [Alphabetical list of main options]

DBM
  building dbm files

    Exim utilities [Making DBM files (exim_dbmbuild)]

  lookup type

    File and database lookups [dbm]

DBM libraries
  configuration for building

    Building and installing Exim [DBM libraries], Building and installing Exim [Overriding build-time options for Exim]

  discussion of

    Building and installing Exim [DBM libraries]

DCSP
  outbound

    The smtp transport [Private options for smtp]

DKIM

  DKIM, SPF, SRS and DMARC [DKIM (DomainKeys Identified Mail)]

  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  controlling calls to the ACL

    Main configuration [Alphabetical list of main options]

  disable verify

    Access control lists [Use of the control modifier]

  log line

    Log files [Other log entries]

  selecting signature algorithms

    Main configuration [Alphabetical list of main options], DKIM, SPF, SRS and DMARC [Verifying DKIM signatures in incoming mail]

  signing

    DKIM, SPF, SRS and DMARC [Signing outgoing messages]

  verification

    DKIM, SPF, SRS and DMARC [Verifying DKIM signatures in incoming mail]

  verification logging

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

DMARC
  ACL condition

    DKIM, SPF, SRS and DMARC [ACL]

  configuration

    DKIM, SPF, SRS and DMARC [Configuration]

  configuration options

    DKIM, SPF, SRS and DMARC [Configuration]

  controls

    DKIM, SPF, SRS and DMARC [Controls]

  disable verify

    Access control lists [Use of the control modifier]

  example

    DKIM, SPF, SRS and DMARC [Example]

  logging

    DKIM, SPF, SRS and DMARC [Logging]

  main section options

    Main configuration [Alphabetical list of main options]

  result

    DKIM, SPF, SRS and DMARC [ACL]

  verification

    DKIM, SPF, SRS and DMARC [DMARC]

DNS
  CNAME following

    Main configuration [Alphabetical list of main options]

  DNSSEC

    String expansions [Expansion variables], String expansions [Expansion variables], String expansions [Expansion variables], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Generic options for routers, Generic options for routers, The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  EDNS0

    Main configuration [Alphabetical list of main options]

  IPv4 preference

    The dnslookup router [Private options for dnslookup]

  IPv6 disabling

    Main configuration [Alphabetical list of main options], The dnslookup router [Private options for dnslookup]

  IPv6 lookup for AAAA records

    Main configuration [Alphabetical list of main options]

  OpenBSD

    Main configuration [Alphabetical list of main options]

  TTL

    File and database lookups [Dnsdb lookup modifiers], Access control lists [Using DNS lists]

  as a lookup type

    File and database lookups [dnsdb], File and database lookups [More about dnsdb]

  pre-check of name syntax

    Main configuration [Alphabetical list of main options]

  qualifying single-component names

    The dnslookup router [Private options for dnslookup]

  resolver options

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], The dnslookup router [Private options for dnslookup], The dnslookup router [Private options for dnslookup]

  reverse lookup

    String expansions [Expansion variables], Main configuration [Alphabetical list of main options], Format of spool files [Format of the -H file]

  timeout

    File and database lookups [Dnsdb lookup modifiers], Main configuration [Alphabetical list of main options]

  try again response; overriding

    Main configuration [Alphabetical list of main options]

DNS list
  IPv6 usage

    Access control lists [DNS lists and IPv6]

  data returned from

    Access control lists [Data returned by DNS lists]

  in ACL

    Access control lists [ACL conditions], Access control lists [Using DNS lists]

  information from merged

    Access control lists [Detailed information from merged DNS lists]

  keyed by domain name

    Access control lists [DNS lists keyed on domain names]

  keyed by explicit IP address

    Access control lists [Specifying the IP address for a DNS list lookup]

  logging defer

    Log files [Reducing or increasing what is logged]

  matching specific returned data

    Access control lists [Additional matching conditions for DNS lists]

  multiple keys for

    Access control lists [Multiple explicit keys for a DNS list]

  variables set from

    Access control lists [Variables set from DNS lists]

DNS resolver, debugging output

  The Exim command line [Command line options]

DNSSEC
  MX lookup

    Generic options for routers, Generic options for routers, The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  dns lookup

    File and database lookups [Dnsdb lookup modifiers]

DSCP
  inbound

    Access control lists [Use of the control modifier]

  values

    The Exim command line [Command line options]

DSN
  success

    Main configuration [Alphabetical list of main options], Generic options for routers, The redirect router

Darwin

  How Exim receives and delivers mail [Message identification]

Date:

  Message processing [Date:]

Debian
  information sources

    Introduction [Exim documentation]

  mailing list for

    Introduction [Mailing lists]

Delivery Status Notification
  success

    Main configuration [Alphabetical list of main options], Generic options for routers, The redirect router

Delivery-date: header line

  Main configuration [Alphabetical list of main options], Generic options for transports, Message processing [Delivery-date:]

daemon

  The Exim command line [Command line options], The Exim command line [Command line options], SMTP processing [Incoming SMTP messages over TCP/IP]

  TCP_NODELAY on sockets

    Main configuration [Alphabetical list of main options]

  listening IP addresses

    Starting the daemon and the use of network interfaces

  pid file path

    Main configuration [Alphabetical list of main options]

  process id (pid)

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options]

  reload configuration

    The Exim command line [Command line options]

  restarting

    The Exim command line [Command line options], Security considerations [Running Exim without privilege]

  starting

    Starting the daemon and the use of network interfaces

daemon notifier socket

  The Exim command line [Command line options]

daemon startup, retrying

  Main configuration [Alphabetical list of main options]

database
  lmdb

    File and database lookups [lmdb]

  lookups

    File and database lookups

  updating in ACL

    Access control lists [ACL modifiers]

dbmjz lookup type

  File and database lookups [dbmjz]

dbmnz lookup type

  File and database lookups [dbmnz]

de-tainting

  see also "tainted data"

  using ACL domains condition

    Domain, host, address, and local part lists [Domain lists]

  using a lookup expansion

    File and database lookups [Examples of different lookup syntax]

  using a match_local_part expansion condition

    String expansions [Expansion conditions]

  using a single-key lookup

    File and database lookups [Lookup types]

  using an inlist expansion condition

    String expansions [Expansion conditions]

  using appendfile create_file option

    The appendfile transport [Private options for appendfile]

  using recipient verify

    Access control lists [Callout verification]

  using router check_local_user option

    Generic options for routers

  using router domains option

    How Exim receives and delivers mail [Router preconditions], Domain, host, address, and local part lists [Domain lists]

debugging
  -N option

    The Exim command line [Command line options]

  -bh option

    The Exim command line [Command line options]

  -d option

    The Exim command line [Command line options]

  UTF-8 in

    The Exim command line [Command line options]

  enabling from an ACL

    Access control lists [Use of the control modifier]

  from embedded Perl

    Embedded Perl [Calling Exim functions from Perl]

  list of selectors

    The Exim command line [Command line options]

  memory corruption

    Main configuration [Alphabetical list of main options]

  suppressing delivery

    The Exim command line [Command line options]

decode ACL condition

  Access control lists [ACL conditions]

def expansion condition

  String expansions [Expansion conditions]

default
  ACLs

    The default configuration file [ACL configuration]

  configuration file walk through

    The default configuration file

  in single-key lookups

    File and database lookups [Default values in single-key lookups]

  retry rule

    The default configuration file [Default retry rule]

  routers

    The default configuration file [Router configuration]

  transports

    The default configuration file [Transport configuration]

defer ACL verb

  Access control lists [ACL verbs]

defer in system filter

  System-wide message filtering [Defer, freeze, and fail commands for system filters]

defer, fake

  Access control lists [Use of the control modifier]

deferred delivery, forcing

  The redirect router [Special items in redirection lists]

delay ACL modifier

  Access control lists [ACL modifiers]

delay warning, specifying

  Main configuration [Alphabetical list of main options]

delayed delivery, logging

  Log files [Reducing or increasing what is logged]

delivery
  abandoning further attempts

    The Exim command line [Command line options]

  blackhole

    The redirect router [Special items in redirection lists]

  by external agent

    The pipe transport [Using an external local delivery agent]

  cancelling all

    The Exim command line [Command line options]

  cancelling by address

    The Exim command line [Command line options]

  cutthrough; logging

    Log files [Logging deliveries]

  deferral

    How Exim receives and delivers mail [Delivery in detail]

  delaying certain domains

    Main configuration [Alphabetical list of main options]

  discard

    The redirect router [Special items in redirection lists]

  discarded; logging

    Log files [Discarded deliveries]

  failure report

    see "bounce message"

  failure; logging

    Log files [Delivery failures]

  fake; logging

    Log files [Fake deliveries]

  first

    String expansions [Expansion conditions]

  forcing attempt

    The Exim command line [Command line options]

  forcing deferral

    The redirect router [Special items in redirection lists]

  forcing failure

    The redirect router [Special items in redirection lists], The Exim monitor [The queue menu]

  forcing in queue run

    The Exim command line [Command line options]

  from given sender

    The Exim command line [Command line options]

  in detail

    How Exim receives and delivers mail [Delivery in detail]

  in the background

    The Exim command line [Command line options]

  in the foreground

    The Exim command line [Command line options]

  log line format

    Generic options for routers

  manually started – not forced

    The Exim command line [Command line options]

  maximum number of

    Main configuration [Alphabetical list of main options]

  parallelism for remote

    Main configuration [Alphabetical list of main options]

  parallelism for transport

    Generic options for transports

  permanent failure

    How Exim receives and delivers mail [Permanent delivery failure]

  problems with

    Building and installing Exim [Testing]

  procmail

    The pipe transport [Using an external local delivery agent]

  retry in remote transports

    How Exim receives and delivers mail [Delivery in detail]

  retry mechanism

    How Exim receives and delivers mail [Retry mechanism]

  sorting remote

    Main configuration [Alphabetical list of main options]

  suppressing immediate

    The Exim command line [Command line options]

  temporary failure

    How Exim receives and delivers mail [Temporary delivery failure]

  to file; forbidding

    The redirect router [Private options for the redirect router]

  to given domain

    The Exim command line [Command line options]

  to pipe; forbidding

    The redirect router [Private options for the redirect router]

  to single file

    The appendfile transport [Operational details for delivery to a new file]

  unprivileged

    Main configuration [Alphabetical list of main options]

delivery failure, long-term

  Retry configuration [Long-term failures]

deny ACL verb

  Access control lists [ACL verbs]

design philosophy

  How Exim receives and delivers mail [Overall philosophy]

dialup

  see "intermittently connected hosts"

directories, multiple

  Main configuration [Alphabetical list of main options]

directory creation

  The appendfile transport, The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending], The appendfile transport [Operational details for delivery to a new file]

disable DKIM verify

  Access control lists [Use of the control modifier]

disable DMARC verify

  Access control lists [Use of the control modifier]

discard ACL verb

  Access control lists [ACL verbs]

discarded messages

  Log files [Discarded deliveries]

discarding bounce message

  Main configuration [Alphabetical list of main options]

disk space, checking

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

distribution
  FTP site

    Introduction [Where to find the Exim distribution]

  https site

    Introduction [Where to find the Exim distribution]

  public key

    Introduction [Where to find the Exim distribution]

  signing details

    Introduction [Where to find the Exim distribution]

dlfunc

  String expansions [Expansion items]

  API description

    Adding a local scan function to Exim [API for local_scan()]

dns
  logging slow lookups

    Main configuration [Alphabetical list of main options]

dnsdb lookup

  File and database lookups [More about dnsdb]

dnsdb modifiers

  File and database lookups [Dnsdb lookup modifiers]

dnslists ACL condition

  Access control lists [ACL conditions]

dnslookup router

  The dnslookup router

  declines

    The dnslookup router [Declining addresses by dnslookup]

dnssec
  logging

    Log files [Reducing or increasing what is logged]

doc/ChangeLog

  Introduction [Exim documentation]

doc/NewStuff

  Introduction [Exim documentation]

doc/spec.txt

  Introduction [Exim documentation]

documentation

  Introduction [Exim documentation]

  available formats

    Introduction [Where to find the Exim distribution]

domain
  ACL checking

    Access control lists [ACL conditions]

  UTF-8 characters in

    Main configuration [Alphabetical list of main options]

  definition of

    Introduction [Terminology]

  delaying delivery

    Main configuration [Alphabetical list of main options]

  delivery to

    The Exim command line [Command line options]

  extraction

    String expansions [Expansion operators]

  for qualifying addresses

    Main configuration [Alphabetical list of main options]

  in redirection; preserving

    The redirect router [Private options for the redirect router]

  manually routing

    The manualroute router

  partial; widening

    The dnslookup router [Private options for dnslookup]

  specifying non-immediate delivery

    Main configuration [Alphabetical list of main options]

  virtual

    Some common configuration settings [Virtual domains]

domain list
  asterisk in

    Domain, host, address, and local part lists [Domain lists]

  in expansion condition

    String expansions [Expansion conditions]

  matching MX pointers to local host

    Domain, host, address, and local part lists [Domain lists]

  matching by lookup

    Domain, host, address, and local part lists [Domain lists]

  matching ends with

    Domain, host, address, and local part lists [Domain lists]

  matching literal domain name

    Domain, host, address, and local part lists [Domain lists]

  matching local IP interfaces

    Domain, host, address, and local part lists [Domain lists]

  matching primary host name

    Domain, host, address, and local part lists [Domain lists]

  matching regular expression

    Domain, host, address, and local part lists [Domain lists]

  patterns for

    Domain, host, address, and local part lists [Domain lists]

domain literal

  Domain, host, address, and local part lists [Domain lists], Main configuration [Alphabetical list of main options]

  default router

    The default configuration file [Router configuration]

  recognizing format

    The default configuration file [Main configuration settings]

  routing

    The ipliteral router

domainless addresses

  Introduction [Limitations]

domains ACL condition

  Access control lists [ACL conditions]

dot
  in incoming non-SMTP message

    The Exim command line [Command line options], The Exim command line [Command line options]

  in local part

    Message processing [Dots in local parts]

  trailing on domain

    Main configuration [Alphabetical list of main options]

dovecot authenticator

  The dovecot authenticator

drivers
  adding new

    Adding new drivers or lookup types

  configuration format

    The Exim runtime configuration file [Format of driver configurations]

  definition of

    How Exim receives and delivers mail [Processing an address for delivery]

  instance definition

    How Exim receives and delivers mail [Processing an address for delivery]

drop ACL verb

  Access control lists [ACL verbs]

dsearch lookup type

  File and database lookups [dsearch]

duplicate addresses

  How Exim receives and delivers mail [Duplicate addresses], The Exim command line [Command line options], Generic options for routers, The redirect router [Duplicate addresses]

dynamic modules

  Building and installing Exim [Dynamically loaded lookup module support]

### E

EACCES

  The redirect router [Private options for the redirect router]

EAI

  String expansions [Expansion operators], Internationalisation

EHLO

  SMTP processing [Outgoing SMTP and LMTP over TCP/IP], Log files [Logging message reception]

  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used], Access control lists [The EHLO/HELO ACL]

  accepting junk data

    Main configuration [Alphabetical list of main options]

  argument, setting

    The smtp transport [Private options for smtp]

  avoiding use of

    The smtp transport [Private options for smtp]

  forcing reverse lookup

    Main configuration [Alphabetical list of main options]

  invalid data

    SMTP processing [Incoming SMTP messages over TCP/IP]

  underscores in

    Main configuration [Alphabetical list of main options]

  verifying

    Access control lists [ACL conditions]

  verifying, mandatory

    Main configuration [Alphabetical list of main options]

  verifying, optional

    Main configuration [Alphabetical list of main options]

ENOTDIR

  The redirect router [Private options for the redirect router]

ESMTP extensions
  8BITMIME

    Main configuration [Alphabetical list of main options]

  AUTH

    Main configuration [Alphabetical list of main options], SMTP authentication

  CHUNKING

    Main configuration [Alphabetical list of main options]

  DSN

    Main configuration [Alphabetical list of main options]

  ETRN

    Main configuration [Alphabetical list of main options], SMTP processing [The ETRN command]

  PIPECONNECT

    Main configuration [Alphabetical list of main options]

  PIPELINING

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], Access control lists [Use of the control modifier]

  PRDR

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp]

  SIZE

    Main configuration [Alphabetical list of main options], SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  SMTPUTF8

    Main configuration [Alphabetical list of main options], Internationalisation [MTA operations]

  STARTTLS

    Main configuration [Alphabetical list of main options], Encrypted SMTP connections using TLS/SSL [Configuring an Exim server to use TLS], Encrypted SMTP connections using TLS/SSL [Configuring an Exim client to use TLS]

ESMTP, avoiding use of

  The smtp transport [Private options for smtp]

ETRN
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  command to be run

    Main configuration [Alphabetical list of main options]

  logging

    Log files [Reducing or increasing what is logged]

  processing

    SMTP processing [The ETRN command]

  serializing

    Main configuration [Alphabetical list of main options]

  value of $domain

    String expansions [Expansion variables]

EXIM_GROUP

  The Exim runtime configuration file

EXIM_USER

  The Exim runtime configuration file

EXPN
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  error text, display of

    The redirect router [Special items in redirection lists]

  processing

    SMTP processing [The VRFY and EXPN commands]

  router skipping

    Generic options for routers

  with verify_only

    Generic options for routers []

EXTRALIBS

  Building and installing Exim [Overriding build-time options for Exim]

Envelope-to: header line

  Main configuration [Alphabetical list of main options], Generic options for transports, Address batching in local transports, Message processing [Envelope-to:]

Exim arguments, logging

  Log files [Reducing or increasing what is logged]

Exim binary, path name

  Main configuration [Alphabetical list of main options]

Exim group

  Main configuration [Alphabetical list of main options]

Exim monitor
  acknowledgment

    Incorporated code

  description

    The Exim monitor

  window size

    The Exim monitor [Main action buttons]

Exim user

  Main configuration [Alphabetical list of main options]

Exim version

  Main configuration [Alphabetical list of main options]

empty item in hosts list

  Domain, host, address, and local part lists [Special host list patterns]

encrypted ACL condition

  Access control lists [ACL conditions]

encrypted strings, comparing

  String expansions [Expansion conditions]

encryption
  checking in an ACL

    Access control lists [ACL conditions]

  including support for

    Building and installing Exim [Including TLS/SSL encryption support]

  on SMTP connection

    Main configuration [Alphabetical list of main options], Encrypted SMTP connections using TLS/SSL

endpass ACL modifier

  Access control lists [ACL modifiers]

envelope from

  The Exim command line [Trusted and admin users], The Exim command line [Command line options], The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Generic options for routers, Generic options for transports, The appendfile transport [Private options for appendfile], Address rewriting [When does rewriting happen?], System-wide message filtering [Setting an errors address in a system filter], Message processing [The UUCP From line], Some common configuration settings [Variable Envelope Return Paths (VERP)]

envelope sender

  The Exim command line [Trusted and admin users], The Exim command line [Command line options], The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Generic options for routers, Generic options for transports, The appendfile transport [Private options for appendfile], The pipe transport [Private options for pipe], System-wide message filtering [Setting an errors address in a system filter], Message processing [The UUCP From line], Some common configuration settings [Variable Envelope Return Paths (VERP)]

  rewriting at transport time

    Address rewriting [When does rewriting happen?]

envelope, definition of

  Introduction [Terminology]

environment

  The Exim command line [Command line options]

  local transports

    Environment for running local transports

  pipe transport

    The pipe transport [Environment variables], The pipe transport [Private options for pipe]

  set values

    Main configuration [Alphabetical list of main options]

  values from

    String expansions [Expansion items], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

eq expansion condition

  String expansions [Expansion conditions]

eqi expansion condition

  String expansions [Expansion conditions]

error
  ignored

    Log files [Other log entries]

  in configuration file

    The Exim runtime configuration file

  in outgoing SMTP

    SMTP processing [Errors in outgoing SMTP]

  reporting

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options]

  skipping bad syntax

    The redirect router [Private options for the redirect router]

escape characters in quoted strings

  The Exim runtime configuration file [String values]

escape expansion item

  String expansions [Expansion operators]

escape8bit expansion item

  String expansions [Expansion operators]

eval expansion item

  String expansions [Expansion operators]

events

  Main configuration [Alphabetical list of main options], Generic options for transports, Events

exec failure

  The pipe transport [Private options for pipe]

exicyclog

  Log files [Logging to local files that are periodically cycled], Exim utilities [Cycling log files (exicyclog)]

exigrep

  Exim utilities [Extracting specific information from the log (exigrep)]

exim_checkaccess

  Exim utilities [Checking access policy (exim_checkaccess)]

exim_dbmbuild

  Exim utilities [Making DBM files (exim_dbmbuild)]

exim_dumpdb

  Exim utilities [exim_dumpdb]

exim_fixdb

  Exim utilities [exim_fixdb]

exim_lock

  Exim utilities [Mailbox maintenance (exim_lock)]

exim_monitor/EDITME

  Building and installing Exim [Pre-building configuration], The Exim monitor

exim_msgdate

  How Exim receives and delivers mail [Message identification], Exim utilities [Message Ids for humans (exim_msgdate)]

exim_tidydb

  Exim utilities [exim_tidydb]

eximon

  The Exim monitor

eximstats

  Exim utilities [Mail statistics (eximstats)]

exinext

  Exim utilities [Finding individual retry times (exinext)]

exipick

  Exim utilities [Selecting messages by various criteria (exipick)]

exiqgrep

  Exim utilities [Selective queue listing (exiqgrep)]

exiqsumm

  Exim utilities [Summarizing the queue (exiqsumm)]

exiscan

  see "content scanning"

exists, expansion condition

  String expansions [Expansion conditions]

exiwhat

  Main configuration [Alphabetical list of main options], Exim utilities [Finding out what Exim processes are doing (exiwhat)]

expansion
  IP address

    String expansions [Expansion operators]

  IP address masking

    String expansions [Expansion operators]

  LDAP authentication test

    String expansions [Expansion conditions]

  MD5 hash

    String expansions [Expansion operators]

  PAM authentication test

    String expansions [Expansion conditions]

  RFC 2047

    String expansions [Expansion operators], String expansions [Expansion operators]

  RFC 2822 address handling

    String expansions [Expansion operators], String expansions [Expansion operators]

  Radius authentication

    String expansions [Expansion conditions]

  SHA-1 hashing

    String expansions [Expansion operators]

  SHA-256 hashing

    String expansions [Expansion operators]

  SHA3 hashing

    String expansions [Expansion operators]

  UTF-8

    String expansions [Expansion operators]

  UTF-8 conversion

    String expansions [Expansion operators]

  and of conditions

    String expansions [Combining expansion conditions]

  arithmetic expression

    String expansions [Expansion operators]

  base64 decoding

    String expansions [Expansion operators]

  base64 encoding

    String expansions [Expansion operators]

  boolean parsing

    String expansions [Expansion conditions], String expansions [Expansion conditions]

  calling Perl from

    String expansions [Expansion items]

  calling an acl

    String expansions [Expansion items], String expansions [Expansion conditions]

  case forcing

    String expansions [Expansion operators], String expansions [Expansion operators]

  character translation

    String expansions [Expansion items]

  checking for empty variable

    String expansions [Expansion conditions]

  checking header line existence

    String expansions [Expansion conditions]

  combining conditions

    String expansions [Combining expansion conditions]

  conditional

    String expansions [Expansion items]

  conditions

    String expansions [Expansion conditions]

  conversion to base 32

    String expansions [Expansion operators], String expansions [Expansion operators]

  conversion to base 62

    String expansions [Expansion operators], String expansions [Expansion operators]

  definition of

    The Exim runtime configuration file [Expanded strings]

  domain extraction

    String expansions [Expansion operators]

  encrypted comparison

    String expansions [Expansion conditions]

  escape sequences

    String expansions [Character escape sequences in expanded strings]

  escaping 8-bit characters

    String expansions [Expansion operators]

  escaping non-printing characters

    String expansions [Expansion operators]

  expression evaluation

    String expansions [Expansion operators]

  extracting certificate fields

    String expansions [Expansion items]

  extracting from JSON array

    String expansions [Expansion items]

  extracting from JSON object

    String expansions [Expansion items]

  extracting list elements by number

    String expansions [Expansion items]

  extracting substrings by key

    String expansions [Expansion items]

  extracting substrings by number

    String expansions [Expansion items]

  extracting value from environment

    String expansions [Expansion items]

  file existence test

    String expansions [Expansion conditions]

  first delivery test

    String expansions [Expansion conditions]

  forall condition

    String expansions [Expansion conditions]

  forall_json condition

    String expansions [Expansion conditions]

  forall_jsons condition

    String expansions [Expansion conditions]

  forany condition

    String expansions [Expansion conditions]

  forany_json condition

    String expansions [Expansion conditions]

  forany_jsons condition

    String expansions [Expansion conditions]

  forced failure

    String expansions [Forced expansion failure]

  header insertion

    String expansions [Expansion items]

  header wrapping

    String expansions [Expansion operators]

  hex to base64

    String expansions [Expansion operators]

  hmac hashing

    String expansions [Expansion items]

  imap folder

    String expansions [Expansion items]

  including literal text

    String expansions [Literal text in expanded strings]

  inserting an entire file

    String expansions [Expansion items]

  inserting from a socket

    String expansions [Expansion items]

  list creation

    String expansions [Expansion items]

  list item count

    String expansions [Expansion operators]

  list sorting

    String expansions [Expansion items]

  local part extraction

    String expansions [Expansion operators]

  lookup in

    String expansions [Expansion items]

  named list

    String expansions [Expansion operators]

  negating a condition

    String expansions [Expansion conditions]

  non-expandable substrings

    String expansions [Literal text in expanded strings]

  numeric comparison

    String expansions [Expansion conditions]

  numeric hash

    String expansions [Expansion items], String expansions [Expansion operators]

  of lists

    Domain, host, address, and local part lists [Expansion of lists]

  of strings

    String expansions

  operators

    String expansions [Expansion items], String expansions [Expansion operators]

  or of conditions

    String expansions [Combining expansion conditions]

  pwcheck authentication test

    String expansions [Expansion conditions]

  queue runner test

    String expansions [Expansion conditions]

  quoting

    String expansions [Expansion operators]

  re-expansion of substring

    String expansions [Expansion operators]

  reducing a list to a scalar

    String expansions [Expansion items]

  regular expression comparison

    String expansions [Expansion conditions]

  running a command

    String expansions [Expansion items]

  saslauthd authentication test

    String expansions [Expansion conditions]

  selecting from list by condition

    String expansions [Expansion items]

  statting a file

    String expansions [Expansion operators], The redirect router [Private options for the redirect router]

  string comparison

    String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions]

  string concatenation

    String expansions

  string length

    String expansions [Expansion operators]

  string substitution

    String expansions [Expansion items]

  string truncation

    String expansions [Expansion items], String expansions [Expansion operators]

  substring expansion

    String expansions [Expansion operators]

  substring extraction

    String expansions [Expansion items]

  tainted data

    String expansions

  testing

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], String expansions [Testing string expansions]

  textual hash

    String expansions [Expansion items], String expansions [Expansion operators]

  utf-8 forcing

    String expansions [Expansion operators]

  variables

    String expansions [Expansion items]

  variables, list of

    String expansions [Expansion variables]

  variables, set from DNS list

    Access control lists [Variables set from DNS lists]

external authenticator

  The external authenticator

external local delivery

  The pipe transport [Using an external local delivery agent]

external transports

  Introduction [Limitations]

extract
  substrings by key

    String expansions [Expansion items]

  substrings by number

    String expansions [Expansion items]

### F

FAQ

  Introduction [FTP site and websites]

FTP site

  Introduction [FTP site and websites], Introduction [Where to find the Exim distribution]

FreeBSD, MTA indirection

  Building and installing Exim [Replacing another MTA with Exim]

From line

  The Exim command line [Trusted and admin users], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for delivery to a new file], The pipe transport [Private options for pipe], Message processing [The UUCP From line]

From: header line

  The Exim command line [Trusted and admin users], Message processing [From:]

  disabling checking of

    Main configuration [Alphabetical list of main options]

  in bounces

    Main configuration [Alphabetical list of main options]

fail
  in system filter

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

  log line; reducing

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

failing delivery
  forcing

    The redirect router [Special items in redirection lists]

  from filter

    The redirect router [Private options for the redirect router]

failure of exec

  The pipe transport [Private options for pipe]

fake defer

  Access control lists [Use of the control modifier]

fake rejection

  Access control lists [Use of the control modifier]

fakedefer

  Access control lists [Use of the control modifier]

fakereject

  Access control lists [Use of the control modifier]

fallback
  hosts specified on router

    Generic options for routers

  hosts specified on transport

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  randomized hosts

    The smtp transport [Private options for smtp]

fallover

  see "fallback"

fast open, TCP
  enabling, in client

    The smtp transport [Private options for smtp]

fifo (named pipe)

  The appendfile transport [Private options for appendfile]

file
  MBX format

    The appendfile transport [Private options for appendfile]

  appending

    The appendfile transport [Operational details for appending]

  existence test

    String expansions [Expansion conditions]

  extracting characteristics

    String expansions [Expansion operators]

  how a message is held

    How Exim receives and delivers mail [Handling an incoming message]

  in redirection list

    The redirect router [Special items in redirection lists]

  inserting into expansion

    String expansions [Expansion items]

  journal

    How Exim receives and delivers mail [Life of a message]

  locking

    The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending], The appendfile transport [Operational details for appending]

  lookups

    File and database lookups, String expansions [Expansion items]

  mailbox; checking existing format

    The appendfile transport [Private options for appendfile]

  requiring for router

    Generic options for routers

  too many open

    Main configuration [Alphabetical list of main options]

  transport for system filter

    Main configuration [Alphabetical list of main options]

filter
  Sieve

    see "Sieve filter"

  enabling use of

    The redirect router [Private options for the redirect router]

  header lines; adding/removing

    System-wide message filtering [Adding and removing headers in a system filter]

  introduction

    How Exim receives and delivers mail [User filters]

  locking out certain features

    The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router]

  specifying in redirection data

    The redirect router [Interpreting redirection data]

  system filter

    Main configuration [Alphabetical list of main options], System-wide message filtering

  testing

    The Exim command line [Command line options]

  transport filter

    String expansions [Expansion variables], String expansions [Expansion variables], Generic options for transports, The pipe transport [How the command is run], The smtp transport [Private options for smtp], SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  user for processing

    Generic options for routers []

filtering all mail

  System-wide message filtering

final cutoff
  retries, controlling

    The smtp transport [Private options for smtp], Retry configuration [Long-term failures]

first delivery

  String expansions [Expansion conditions]

first pass routing

  The Exim command line [Command line options], The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Access control lists [Use of the control modifier], Some common configuration settings [Exim on the intermittently connected client host]

first_delivery expansion condition

  String expansions [Expansion conditions]

fixed point configuration values

  The Exim runtime configuration file [Fixed point numbers]

force command

  The pipe transport [Private options for pipe]

forcing delivery

  The Exim command line [Command line options]

foreground delivery

  The Exim command line [Command line options]

format
  boolean

    The Exim runtime configuration file [Boolean options]

  configuration file

    The Exim runtime configuration file [Configuration file format]

  fixed point

    The Exim runtime configuration file [Fixed point numbers]

  group name

    The Exim runtime configuration file [User and group names]

  integer

    The Exim runtime configuration file [Integer values]

  list item in configuration

    The Exim runtime configuration file [List construction]

  message

    The Exim command line [Command line options]

  octal integer

    The Exim runtime configuration file [Octal integer values]

  of message id

    How Exim receives and delivers mail [Message identification]

  spool files

    Format of spool files

  string

    The Exim runtime configuration file [String values]

  time interval

    The Exim runtime configuration file [Time intervals]

  user name

    The Exim runtime configuration file [User and group names]

forward file
  broken

    The redirect router [Private options for the redirect router]

  one-time expansion

    The redirect router [Private options for the redirect router]

  ownership

    The redirect router [Private options for the redirect router]

  testing

    The Exim command line [Command line options]

freeze in system filter

  System-wide message filtering [Defer, freeze, and fail commands for system filters]

freezing messages

  The Exim command line [Command line options], System-wide message filtering [Defer, freeze, and fail commands for system filters]

  allowing in filter

    The redirect router [Private options for the redirect router]

  sending a message when freezing

    Main configuration [Alphabetical list of main options]

from_utf8 expansion item

  String expansions [Expansion operators]

frozen messages
  display

    The Exim monitor [The queue display]

  forcing delivery

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options]

  forcing in ACL

    Access control lists [Use of the control modifier]

  in queue listing

    The Exim command line [Command line options]

  logging skipping

    Log files [Reducing or increasing what is logged]

  manual thaw; testing in filter

    System-wide message filtering [Contents of a system filter]

  moving

    Main configuration [Alphabetical list of main options]

  sending a message when freezing

    Main configuration [Alphabetical list of main options]

  spool data

    Format of spool files [Format of the -H file]

  thawing

    How Exim receives and delivers mail [Life of a message], The Exim command line [Command line options], The Exim monitor [The queue menu]

  timing out

    Main configuration [Alphabetical list of main options]

fsync(), disabling

  Main configuration [Alphabetical list of main options]

### G

GnuTLS

  Encrypted SMTP connections using TLS/SSL

  building Exim with

    Building and installing Exim [Including TLS/SSL encryption support]

  specifying parameters for

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

gdbm DBM library

  Building and installing Exim [DBM libraries]

ge expansion condition

  String expansions [Expansion conditions]

gecos field, parsing

  Main configuration [Alphabetical list of main options]

gei expansion condition

  String expansions [Expansion conditions]

generic options

  The Exim runtime configuration file [Format of driver configurations]

  router

    Generic options for routers

  transport

    Generic options for transports

gid (group id)
  Exim’s own

    Main configuration [Alphabetical list of main options]

  caller

    String expansions [Expansion variables]

  in queryprogram router

    The queryprogram router

  in spool file

    Format of spool files [Format of the -H file]

  local delivery

    Generic options for routers

  of originating user

    String expansions [Expansion variables]

  system filter

    Main configuration [Alphabetical list of main options], System-wide message filtering [Specifying a system filter]

giving up on messages

  The Exim command line [Command line options]

greylisting

  Access control lists [Previously seen user and hosts]

groups
  additional

    Generic options for routers, Generic options for transports

  name format

    The Exim runtime configuration file [User and group names]

  trusted

    Main configuration [Alphabetical list of main options]

gsasl authenticator

  The gsasl authenticator

gt expansion condition

  String expansions [Expansion conditions]

gti expansion condition

  String expansions [Expansion conditions]

### H

HELO

  SMTP processing [Outgoing SMTP and LMTP over TCP/IP], Log files [Logging message reception]

  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used], Access control lists [The EHLO/HELO ACL]

  accepting junk data

    Main configuration [Alphabetical list of main options]

  argument, setting

    The smtp transport [Private options for smtp]

  forcing reverse lookup

    Main configuration [Alphabetical list of main options]

  forcing use of

    The smtp transport [Private options for smtp]

  invalid data

    SMTP processing [Incoming SMTP messages over TCP/IP]

  underscores in

    Main configuration [Alphabetical list of main options]

  verifying

    Access control lists [ACL conditions]

HELO verifying
  mandatory

    Main configuration [Alphabetical list of main options]

  optional

    Main configuration [Alphabetical list of main options]

HELO/EHLO
  requiring

    Main configuration [Alphabetical list of main options]

HOME

  The pipe transport [Environment variables]

HOST

  The pipe transport [Environment variables]

HP-UX

  Main configuration [Alphabetical list of main options]

HTTPS download site

  Introduction [Where to find the Exim distribution]

hash function
  numeric

    String expansions [Expansion items], String expansions [Expansion operators]

  textual

    String expansions [Expansion items], String expansions [Expansion operators]

header
  wrapping operator

    String expansions [Expansion operators]

header lines
  Authentication-Results:

    String expansions [Expansion items]

  Bcc:

    The Exim command line [Command line options]

  Cc:

    The Exim command line [Command line options]

  Envelope-to:

    Message processing [Envelope-to:]

  From:

    The Exim command line [Trusted and admin users], Message processing [From:]

  Message-ID:

    Message processing [Message-ID:]

  Received:

    Message processing [Received:]

  References:

    Message processing [References:]

  Resent-

    Message processing [Resent- header lines]

  Return-path:

    Generic options for transports, Message processing [Return-path:]

  Sender:

    The Exim command line [Trusted and admin users], Message processing [Sender:]

  To:

    The Exim command line [Command line options]

  added; visibility of

    Access control lists [Adding header lines in ACLs]

  adding

    Generic options for routers

  adding in an ACL

    Access control lists [Adding header lines in ACLs]

  adding in transport

    Generic options for transports

  adding; in router or transport

    Message processing [Adding and removing header lines in routers and transports]

  adding; in system filter

    System-wide message filtering [Adding and removing headers in a system filter]

  character sets

    String expansions [Expansion items]

  decoding

    String expansions [Expansion items]

  in expansion strings

    String expansions [Expansion items]

  listing

    The Exim command line [Command line options]

  maximum size of

    Main configuration [Alphabetical list of main options]

  position of added lines

    Access control lists [Adding header lines in ACLs]

  position of removed lines

    Access control lists [Removing header lines in ACLs]

  removed; visibility of

    Access control lists [Removing header lines in ACLs]

  removing

    Generic options for routers, Generic options for transports

  removing in an ACL

    Access control lists [Removing header lines in ACLs]

  removing; in router or transport

    Message processing [Adding and removing header lines in routers and transports]

  removing; in system filter

    System-wide message filtering [Adding and removing headers in a system filter]

  rewriting

    The dnslookup router [Private options for dnslookup]

  rewriting at transport time

    Address rewriting [When does rewriting happen?]

  transporting

    Generic options for transports

  verifying header names only ASCII

    Access control lists [ACL conditions]

  verifying syntax

    Access control lists [ACL conditions]

  verifying the sender in

    Access control lists [ACL conditions]

header section
  definition of

    Introduction [Terminology]

  maximum size of

    Main configuration [Alphabetical list of main options]

headers

  see "header lines"

heimdal_gssapi authenticator

  The heimdal_gssapi authenticator

hex2b64 expansion item

  String expansions [Expansion operators]

hexquote expansion item

  String expansions [Expansion operators]

hiding configuration option values

  The Exim command line [Command line options], The Exim runtime configuration file [Common option syntax]

hiding named list values

  Domain, host, address, and local part lists [Named lists]

hints database
  DBM files used for

    Building and installing Exim [DBM libraries]

  ETRN serialization

    SMTP processing [The ETRN command]

  access by remote transport

    Generic options for transports

  callout cache

    Access control lists [Callout caching]

  data expiry

    Main configuration [Alphabetical list of main options], Retry configuration [Timeout of retry data]

  deferred deliveries

    How Exim receives and delivers mail [Temporary delivery failure]

  maintenance

    Exim utilities [Hints database maintenance]

  not overridden by -Mc

    The Exim command line [Command line options]

  overriding retry hints

    The Exim command line [Command line options]

  quota cache

    Access control lists [Quota caching]

  remembering routing

    The Exim command line [Command line options], The smtp transport [Multiple messages on a single connection]

  retry keys

    Generic options for routers, Generic options for transports, SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  serializing deliveries to a host

    The smtp transport [Private options for smtp]

  tls

    Encrypted SMTP connections using TLS/SSL [TLS Resumption]

  transport concurrency control

    Generic options for transports

  use for retrying

    Retry configuration [Retry parameters]

hmac

  String expansions [Expansion items]

home directory
  for local transport

    Generic options for routers [], Environment for running local transports [Current and home directories]

  for router

    Generic options for routers

host
  ACL checking

    Access control lists [ACL conditions]

  alias for

    Domain, host, address, and local part lists [Host list patterns that match by host name]

  error

    SMTP processing [Errors in outgoing SMTP]

  for RFC 1413 calls

    Main configuration [Alphabetical list of main options]

  limiting SMTP connections from

    Main configuration [Alphabetical list of main options]

  list of; randomized

    The manualroute router [Private options for manualroute], The smtp transport [Private options for smtp]

  locally unique number for

    Main configuration [Alphabetical list of main options]

  lookup failures

    Domain, host, address, and local part lists [Host list patterns that match by host name]

  lookup failures, permanent

    Domain, host, address, and local part lists [Behaviour when an IP address or name cannot be found]

  lookup failures, temporary

    Domain, host, address, and local part lists [Temporary DNS errors when looking up host information]

  maximum number to try

    The smtp transport [Private options for smtp], The smtp transport [How the limits for the number of hosts to try are used]

  name in SMTP responses

    Main configuration [Alphabetical list of main options]

  name of local

    Main configuration [Alphabetical list of main options]

  not logging connections from

    Main configuration [Alphabetical list of main options]

  rejecting connections from

    Main configuration [Alphabetical list of main options]

  reserved

    Main configuration [Alphabetical list of main options]

  serializing connections

    The smtp transport [Private options for smtp]

  treated as local

    Main configuration [Alphabetical list of main options]

  unqualified addresses from

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  verifying reverse lookup

    Access control lists [ACL conditions]

host list
  empty string in

    Domain, host, address, and local part lists [Special host list patterns]

  lookup of IP address

    Domain, host, address, and local part lists [Host list patterns for single-key lookups by host address]

  masked IP address

    Domain, host, address, and local part lists [Host list patterns for single-key lookups by host address]

  matching IP addresses

    Domain, host, address, and local part lists [Host list patterns that match by IP address]

  matching host name

    Domain, host, address, and local part lists [Host list patterns that match by host name], Domain, host, address, and local part lists [Host list patterns for single-key lookups by host name]

  mixing names and addresses in

    Domain, host, address, and local part lists [Mixing wildcarded host names and addresses in host lists]

  patterns in

    Domain, host, address, and local part lists [Host lists]

  regular expression in

    Domain, host, address, and local part lists [Host list patterns that match by host name]

host name
  lookup, failure of

    String expansions [Expansion variables]

  lookup, forcing

    Main configuration [Alphabetical list of main options]

  matched in domain list

    Domain, host, address, and local part lists [Domain lists]

hosts ACL condition

  Access control lists [ACL conditions]

### I

IP address
  binding

    The smtp transport [Private options for smtp]

  canonical form

    String expansions [Expansion operators]

  discarding

    Generic options for routers

  for listening

    Starting the daemon and the use of network interfaces

  masking

    Domain, host, address, and local part lists [Host list patterns for single-key lookups by host address], String expansions [Expansion operators]

  normalisation

    String expansions [Expansion operators], String expansions [Expansion operators]

  testing string format

    String expansions [Expansion conditions]

  translating

    Generic options for routers []

IP source routing

  Security considerations [IPv4 source routing]

IPv4
  preference

    The dnslookup router [Private options for dnslookup]

IPv6
  DNS black lists

    Access control lists [DNS lists and IPv6]

  DNS lookup for AAAA records

    Main configuration [Alphabetical list of main options]

  address scopes

    Starting the daemon and the use of network interfaces [IPv6 address scopes]

  addresses in lists

    The Exim runtime configuration file [Changing list separators]

  disabling

    Starting the daemon and the use of network interfaces [Disabling IPv6], Main configuration [Alphabetical list of main options], The dnslookup router [Private options for dnslookup]

  including support for

    Building and installing Exim [Including support for IPv6]

IRIX, DBM library for

  Building and installing Exim [DBM libraries]

InterBase
  server list

    Main configuration [Alphabetical list of main options]

InterBase lookup type

  File and database lookups [ibase], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

i18n

  Internationalisation

  logging

    Internationalisation [MTA operations]

  utf8 address downconversion

    The smtp transport [Private options for smtp], Internationalisation [MTA operations]

iconv() support

  Building and installing Exim [Support for iconv()]

id of message

  How Exim receives and delivers mail [Message identification]

ident

  see "RFC 1413"

if, expansion item

  String expansions [Expansion items]

ignoring faulty addresses

  The redirect router [Private options for the redirect router]

imapfolder expansion item

  String expansions [Expansion items]

included address list

  The redirect router [Special items in redirection lists]

inclusions in configuration file

  The Exim runtime configuration file [File inclusions in the configuration file]

incoming SMTP over TCP/IP

  SMTP processing [Incoming SMTP messages over TCP/IP]

incorporated code

  Incorporated code

incorrect utf-8

  String expansions [Expansion operators]

inetd

  The Exim command line [Command line options], The Exim command line [Command line options], Main configuration [Alphabetical list of main options], SMTP processing [Incoming SMTP messages over TCP/IP]

  wait mode

    The Exim command line [Command line options]

installing Exim

  Building and installing Exim [Installing Exim binaries and scripts]

  info documentation

    Building and installing Exim [Installing info documentation]

  install script options

    Building and installing Exim [Installing Exim binaries and scripts]

  testing the script

    Building and installing Exim [Installing Exim binaries and scripts]

  what is not installed

    Building and installing Exim [Installing Exim binaries and scripts]

integer configuration values

  The Exim runtime configuration file [Integer values]

integer format

  The Exim runtime configuration file [Octal integer values]

interface
  address, specifying for local message

    The Exim command line [Command line options]

  listening

    Starting the daemon and the use of network interfaces

  logging

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  network

    Starting the daemon and the use of network interfaces

intermittently connected hosts

  Some common configuration settings [Intermittently connected hosts]

internationalisation

  String expansions [Expansion operators]

  email address

    Internationalisation

ipliteral router

  The ipliteral router

iplookup router

  The iplookup router

iplsearch lookup type

  File and database lookups [iplsearch]

ipv6denorm expansion item

  String expansions [Expansion operators]

ipv6norm expansion item

  String expansions [Expansion operators]

isip expansion condition

  String expansions [Expansion conditions]

isip4 expansion condition

  String expansions [Expansion conditions]

isip6 expansion condition

  String expansions [Expansion conditions]

### J

JSON
  expansions

    File and database lookups [json], String expansions [Expansion items], String expansions [Expansion items], String expansions [Expansion conditions]

  iterative conditions

    String expansions [Expansion conditions]

journal file

  How Exim receives and delivers mail [Life of a message]

json
  lookup type

    File and database lookups [json]

### K

Kerberos

  The cyrus_sasl authenticator

keepalive
  on incoming connection

    Main configuration [Alphabetical list of main options]

  on outgoing connection

    The smtp transport [Private options for smtp]

### L

LDAP
  ,

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  TLS cipher suite

    Main configuration [Alphabetical list of main options]

  TLS client certificate file

    Main configuration [Alphabetical list of main options]

  TLS client key file

    Main configuration [Alphabetical list of main options]

  authentication

    File and database lookups [LDAP authentication and control information]

  connections

    File and database lookups [LDAP connections]

  default servers

    Main configuration [Alphabetical list of main options]

  including support for

    Building and installing Exim [Overriding build-time options for Exim]

  lookup type

    File and database lookups [ldap]

  lookup, more about

    File and database lookups [More about LDAP]

  policy for LDAP server TLS cert presentation

    Main configuration [Alphabetical list of main options]

  protocol version, forcing

    Main configuration [Alphabetical list of main options]

  query format

    File and database lookups [Format of LDAP queries]

  quoting

    File and database lookups [LDAP quoting]

  returned data formats

    File and database lookups [Format of data returned by LDAP]

  timeout

    File and database lookups [LDAP authentication and control information]

  use for authentication

    String expansions [Expansion conditions]

  whether or not to negotiate TLS

    Main configuration [Alphabetical list of main options]

  with TLS

    File and database lookups [Format of LDAP queries]

LF character

  see "linefeed"

LHLO argument setting

  The smtp transport [Private options for smtp]

LMDB

  File and database lookups [lmdb]

LMTP
  ignoring quota errors

    The lmtp transport, The smtp transport [Private options for smtp]

  logging confirmation

    Log files [Reducing or increasing what is logged]

  over TCP/IP

    The smtp transport [Private options for smtp], SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  over a pipe

    The lmtp transport

  over a socket

    The lmtp transport

  processing details

    SMTP processing

LOGIN authentication mechanism

  The plaintext authenticator [The LOGIN authentication mechanism]

Linux, DBM library for

  Building and installing Exim [DBM libraries]

Local/Makefile

  Building and installing Exim [Pre-building configuration], Building and installing Exim [Overriding build-time options for Exim]

Local/eximon.conf

  Building and installing Exim [Pre-building configuration], Building and installing Exim [Overriding build-time options for the monitor], The Exim monitor

lc expansion item

  String expansions [Expansion operators]

ldapauth expansion condition

  String expansions [Expansion conditions]

le expansion condition

  String expansions [Expansion conditions]

lei expansion condition

  String expansions [Expansion conditions]

length expansion item

  String expansions [Expansion items], String expansions [Expansion operators]

length of login name

  Main configuration [Alphabetical list of main options]

limit
  SMTP connections from one host

    Main configuration [Alphabetical list of main options]

  SMTP syntax and protocol errors

    Main configuration [Alphabetical list of main options]

  bounce message line length

    Main configuration [Alphabetical list of main options]

  bounce message size

    Main configuration [Alphabetical list of main options]

  hosts; maximum number tried

    The smtp transport [How the limits for the number of hosts to try are used]

  incoming SMTP connections

    Main configuration [Alphabetical list of main options]

  message size

    Main configuration [Alphabetical list of main options]

  message size per transport

    Generic options for transports

  messages per SMTP connection

    Main configuration [Alphabetical list of main options]

  non-mail SMTP commands

    Main configuration [Alphabetical list of main options]

  number of MX tried

    The smtp transport [Private options for smtp]

  number of hosts tried

    The smtp transport [Private options for smtp]

  number of recipients

    Main configuration [Alphabetical list of main options]

  on retry interval

    Main configuration [Alphabetical list of main options]

  open files for lookups

    Main configuration [Alphabetical list of main options]

  rate of message arrival

    Main configuration [Alphabetical list of main options]

  retry interval

    Retry configuration [Retry parameters]

  size of message header section

    Main configuration [Alphabetical list of main options]

  size of one header line

    Main configuration [Alphabetical list of main options]

  transport parallelism

    Generic options for transports

  unknown SMTP commands

    Main configuration [Alphabetical list of main options]

  user name length

    Main configuration [Alphabetical list of main options]

limitations of Exim

  Introduction [Limitations]

limiting client sending rates

  Access control lists [Rate limiting incoming messages]

line endings

  Message processing [Line endings]

line length
  limit

    The smtp transport [Private options for smtp]

  maximum

    String expansions [Expansion variables]

linear search

  File and database lookups [lsearch]

linefeed

  The appendfile transport [Private options for appendfile], The pipe transport [Private options for pipe], Message processing [Line endings], SMTP processing [Outgoing SMTP and LMTP over TCP/IP], SMTP processing [Incoming SMTP messages over TCP/IP]

list
  address list

    Domain, host, address, and local part lists [Address lists]

  caching of named

    Domain, host, address, and local part lists [Named list caching]

  count of items

    String expansions [Expansion operators]

  domain list

    Domain, host, address, and local part lists [Domain lists]

  empty item in

    The Exim runtime configuration file [Empty items in lists]

  extracting elements by number

    String expansions [Expansion items]

  filename in

    Domain, host, address, and local part lists [File names in lists]

  host list

    Domain, host, address, and local part lists [Host lists]

  item count

    String expansions [Expansion operators]

  iterative conditions

    String expansions [Expansion conditions], String expansions [Expansion conditions]

  local part list

    Domain, host, address, and local part lists [Local part lists]

  named

    Domain, host, address, and local part lists [Named lists]

  named compared with macro

    Domain, host, address, and local part lists [Named lists compared with macros]

  negation

    Domain, host, address, and local part lists [Negated items in lists]

  of header lines

    String expansions [Expansion items]

  quoting

    String expansions [Expansion items]

  reducing to a scalar

    String expansions [Expansion items]

  selecting by condition

    String expansions [Expansion items]

  sorting

    String expansions [Expansion items]

  syntax of in configuration

    The Exim runtime configuration file [List construction]

list separator
  changing

    The Exim runtime configuration file [Changing list separators]

  newline as

    The Exim runtime configuration file [Changing list separators]

listcount expansion item

  String expansions [Expansion operators]

listextract
  extract list elements by number

    String expansions [Expansion items]

listing
  message body

    The Exim command line [Command line options]

  message headers

    The Exim command line [Command line options]

  message in RFC 2822 format

    The Exim command line [Command line options]

  message log

    The Exim command line [Command line options]

  messages in the queue

    The Exim command line [Command line options]

listnamed expansion item

  String expansions [Expansion operators]

lists of domains; hosts; etc.

  Domain, host, address, and local part lists

lmtp transport

  The lmtp transport

load average

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  re-evaluating per message

    Main configuration [Alphabetical list of main options]

load balancer
  hosts behind

    The smtp transport [Private options for smtp]

local SMTP input

  The Exim command line [Command line options]

local delivery
  definition of

    Introduction [Terminology]

  using an external agent

    The pipe transport [Using an external local delivery agent]

local host
  MX pointing to

    Generic options for routers, The dnslookup router

  domains treated as

    Main configuration [Alphabetical list of main options]

  name of

    Main configuration [Alphabetical list of main options]

  sending to

    Generic options for routers [], The smtp transport [Private options for smtp]

local message reception

  The Exim command line [Command line options]

local part
  ACL checking

    Access control lists [ACL conditions]

  case of

    Message processing [Case of local parts]

  checking in router

    Generic options for routers

  definition of

    Introduction [Terminology]

  dots in

    Message processing [Dots in local parts]

  in retry keys

    Generic options for routers

  list

    Domain, host, address, and local part lists [Local part lists]

  list, in expansion condition

    String expansions [Expansion conditions]

  prefix

    Generic options for transports, Some common configuration settings [Multiple user mailboxes]

  starting with !

    Domain, host, address, and local part lists [Address lists], Domain, host, address, and local part lists [Address lists]

  suffix

    Generic options for transports, Some common configuration settings [Multiple user mailboxes]

local transports
  environment for

    Environment for running local transports

  uid and gid

    Generic options for routers, Generic options for routers, Generic options for routers [], Environment for running local transports [Uids and gids]

local user, checking in router

  Generic options for routers

local_part expansion item

  String expansions [Expansion operators]

local_parts ACL condition

  Access control lists [ACL conditions]

local_scan() function
  API description

    Adding a local scan function to Exim [API for local_scan()]

  address rewriting; timing of

    Address rewriting [When does rewriting happen?]

  available Exim functions

    Adding a local scan function to Exim [Available Exim functions]

  available Exim variables

    Adding a local scan function to Exim [Available Exim variables]

  building Exim to use

    Adding a local scan function to Exim [Building Exim to use a local scan function]

  configuration options

    Adding a local scan function to Exim [Configuration options for local_scan()]

  description of

    Adding a local scan function to Exim

  memory handling

    Adding a local scan function to Exim [More about Exim’s memory handling]

  timeout

    Main configuration [Alphabetical list of main options]

  when all recipients discarded

    Access control lists [ACL return codes]

lock files

  Building and installing Exim [Testing], The appendfile transport [Private options for appendfile]

locking files

  The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending], The appendfile transport [Operational details for appending]

locking mailboxes

  Exim utilities [Mailbox maintenance (exim_lock)]

log
  8BITMIME

    Main configuration [Alphabetical list of main options], Log files [Reducing or increasing what is logged]

  DANE

    Log files [Reducing or increasing what is logged]

  DKIM verification

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  DNS failure in list

    Log files [Reducing or increasing what is logged]

  ETRN commands

    Log files [Reducing or increasing what is logged]

  Exim arguments

    Log files [Reducing or increasing what is logged]

  SMTP connections

    Log files [Reducing or increasing what is logged]

  SMTP protocol error

    Log files [Reducing or increasing what is logged]

  SMTP syntax error

    Log files [Reducing or increasing what is logged]

  SMTP transaction; incomplete

    Log files [Reducing or increasing what is logged]

  TLS SNI

    Log files [Reducing or increasing what is logged]

  TLS cipher

    Encrypted SMTP connections using TLS/SSL [Configuring an Exim server to use TLS], Encrypted SMTP connections using TLS/SSL [Configuring an Exim client to use TLS], Log files [Reducing or increasing what is logged]

  TLS peer DN

    Log files [Reducing or increasing what is logged]

  TLS resumption

    Log files [Reducing or increasing what is logged]

  certificate verification

    Log files [Reducing or increasing what is logged]

  connection identifier

    Log files [Reducing or increasing what is logged]

  connection rejections

    Log files [Reducing or increasing what is logged]

  cycling local files

    Log files [Logging to local files that are periodically cycled], Exim utilities [Cycling log files (exicyclog)]

  datestamped files

    Log files [Datestamped log files]

  delayed delivery

    Log files [Reducing or increasing what is logged]

  delivery duration

    Log files [Reducing or increasing what is logged]

  delivery line

    Generic options for routers, Log files [Logging deliveries]

  destination

    Log files [Where the logs are written]

  distinguished name

    Encrypted SMTP connections using TLS/SSL [Requesting and verifying client certificates], Encrypted SMTP connections using TLS/SSL [Configuring an Exim client to use TLS]

  dnslist defer

    Log files [Reducing or increasing what is logged]

  dnssec

    Log files [Reducing or increasing what is logged]

  dropped connection

    Log files [Reducing or increasing what is logged]

  extracts; grepping for

    Exim utilities [Extracting specific information from the log (exigrep)]

  fail command log line

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

  file for each message

    How Exim receives and delivers mail [Life of a message]

  file path for

    Main configuration [Alphabetical list of main options]

  frozen messages; skipped

    Log files [Reducing or increasing what is logged]

  full parentage

    Log files [Reducing or increasing what is logged]

  general description

    Log files

  header lines for rejection

    Log files [Reducing or increasing what is logged]

  host lookup failure

    Log files [Reducing or increasing what is logged]

  ident timeout

    Log files [Reducing or increasing what is logged]

  incoming interface

    Log files [Reducing or increasing what is logged]

  incoming proxy address

    Log files [Reducing or increasing what is logged]

  incoming remote port

    Log files [Reducing or increasing what is logged]

  local address and port

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  local files; writing to

    Log files [Logging to local files that are periodically cycled]

  local interface

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  message id

    Log files [Reducing or increasing what is logged]

  message log; description of

    Log files [Message log]

  message log; disabling

    Main configuration [Alphabetical list of main options]

  message size on delivery

    Log files [Reducing or increasing what is logged]

  millisecond timestamps

    Log files [Reducing or increasing what is logged]

  non-MAIL SMTP sessions

    Log files [Reducing or increasing what is logged]

  outgoing interface

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  outgoing remote port

    Log files [Reducing or increasing what is logged]

  pipelining

    Log files [Reducing or increasing what is logged]

  process ids in

    Log files, Log files [Reducing or increasing what is logged]

  process log

    Main configuration [Alphabetical list of main options]

  protocol

    Log files [Logging message reception], Internationalisation [MTA operations]

  queue run

    Log files [Reducing or increasing what is logged]

  queue time

    Log files [Reducing or increasing what is logged]

  receive duration

    Log files [Reducing or increasing what is logged]

  reception line

    Log files [Logging message reception]

  recipients

    Log files [Reducing or increasing what is logged]

  retry defer

    Log files [Reducing or increasing what is logged]

  return path

    Log files [Reducing or increasing what is logged]

  rewriting

    Log files [Reducing or increasing what is logged]

  selectors

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Log files [Reducing or increasing what is logged]

  sender on delivery

    Log files [Reducing or increasing what is logged]

  sender reception

    Log files [Reducing or increasing what is logged]

  sender verify failure

    Log files [Reducing or increasing what is logged]

  size rejection

    Log files [Reducing or increasing what is logged]

  smtp confirmation

    Log files [Reducing or increasing what is logged]

  subject

    Log files [Reducing or increasing what is logged]

  summary of fields

    Log files [Summary of Fields in Log Lines]

  syslog; writing to

    Log files [Logging to syslog]

  tail of; in monitor

    The Exim monitor [The log display]

  timezone for entries

    Main configuration [Alphabetical list of main options]

  to file

    Log files [Where the logs are written]

  to syslog

    Log files [Where the logs are written]

  types of

    Log files

  unknown SMTP command

    Log files [Reducing or increasing what is logged]

  writing from embedded Perl

    Embedded Perl [Calling Exim functions from Perl]

log_message ACL modifier

  Access control lists [ACL modifiers]

log_reject_target ACL modifier

  Access control lists [ACL modifiers]

logging
  custom

    Events

  slow lookups

    Main configuration [Alphabetical list of main options]

logging in ACL
  immediate

    Access control lists [ACL modifiers]

  specifying which log

    Access control lists [ACL modifiers]

logwrite ACL modifier

  Access control lists [ACL modifiers]

lookup
  * added to type

    File and database lookups [Default values in single-key lookups]

  *@ added to type

    File and database lookups [Default values in single-key lookups]

  DNS

    File and database lookups [dnsdb]

  InterBase

    File and database lookups [ibase], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  LDAP

    File and database lookups [ldap], File and database lookups [More about LDAP]

  MySQL

    File and database lookups [mysql], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  NIS

    File and database lookups [nis]

  NIS+

    File and database lookups [nisplus], File and database lookups [More about NIS+]

  Oracle

    File and database lookups [oracle], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  PostgreSQL

    File and database lookups [pgsql], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  Redis

    File and database lookups [redis], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis], File and database lookups [More about Redis]

  SQLite

    File and database lookups [More about SQLite]

  caching

    File and database lookups [Lookup caching]

  cdb

    File and database lookups [cdb]

  dbm

    File and database lookups [dbm]

  dbm – embedded NULs

    File and database lookups [dbmjz]

  dbm – terminating zero

    File and database lookups [dbmnz]

  dbmjz

    File and database lookups [dbmjz]

  dbmnz

    File and database lookups [dbmnz]

  default values

    File and database lookups [Default values in single-key lookups]

  description of

    File and database lookups

  dnsdb

    File and database lookups [More about dnsdb]

  dsearch

    File and database lookups [dsearch]

  in domain list

    Domain, host, address, and local part lists [Domain lists]

  in expanded string

    String expansions [Expansion items]

  inclusion in binary

    Building and installing Exim [Overriding build-time options for Exim]

  iplsearch

    File and database lookups [iplsearch]

  json

    File and database lookups [json]

  lmdb

    File and database lookups [lmdb]

  lsearch

    File and database lookups [lsearch]

  lsearch – colons in keys

    File and database lookups [lsearch]

  maximum open files

    Main configuration [Alphabetical list of main options]

  nwildlsearch

    File and database lookups [(n)wildlsearch]

  partial matching

    File and database lookups [Partial matching in single-key lookups]

  partial matching – changing prefix

    File and database lookups [Partial matching in single-key lookups]

  passwd

    File and database lookups [passwd]

  query-style types

    File and database lookups [Query-style lookup types]

  quoting

    File and database lookups [Quoting lookup data]

  single-key types

    File and database lookups [Single-key lookup types]

  spf

    File and database lookups [spf], DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  sqlite

    File and database lookups [sqlite]

  temporary error in

    File and database lookups [Temporary errors in lookups]

  types of

    File and database lookups [Lookup types]

  whoson

    File and database lookups [whoson]

  wildcard

    File and database lookups [Default values in single-key lookups], File and database lookups [Partial matching in single-key lookups]

  wildlsearch

    File and database lookups [(n)wildlsearch]

lookup modules

  Building and installing Exim [Dynamically loaded lookup module support]

loop
  caused by fail

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

  in lookups

    Domain, host, address, and local part lists [Address lists]

  prevention

    Main configuration [Alphabetical list of main options]

  while file testing

    The appendfile transport [Operational details for appending]

  while routing

    How Exim receives and delivers mail [Delivery in detail]

  while routing, avoidance of

    The redirect router [Redirecting to a local mailbox]

lower casing

  String expansions [Expansion operators], Exim utilities [Making DBM files (exim_dbmbuild)]

lsearch lookup type

  File and database lookups [lsearch]

lt expansion condition

  String expansions [Expansion conditions]

lti expansion condition

  String expansions [Expansion conditions]

### M

MAIL
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  SIZE option

    SMTP processing [Incoming SMTP messages over TCP/IP]

  logging session without

    Log files [Reducing or increasing what is logged]

  rewriting argument of

    Address rewriting [The SMTP-time rewriting flag]

MBX format, specifying

  The appendfile transport [Private options for appendfile]

MD5 hash

  String expansions [Expansion operators], String expansions [Expansion conditions]

MIME content scanning

  Content scanning at ACL time [Scanning MIME parts]

  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  returned variables

    Content scanning at ACL time [Scanning MIME parts]

MMDF format mailbox

  The appendfile transport [Private options for appendfile]

MX record
  checking for secondary

    The dnslookup router [Private options for dnslookup]

  in dnsdb lookup

    File and database lookups [More about dnsdb], File and database lookups [Pseudo dnsdb record types]

  maximum tried

    The smtp transport [Private options for smtp]

  not found

    The dnslookup router [Private options for dnslookup]

  pointing to IP address

    Main configuration [Alphabetical list of main options]

  pointing to local host

    Generic options for routers, The dnslookup router

  required to exist

    The dnslookup router [Private options for dnslookup]

  security

    Generic options for routers, Generic options for routers, The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

Message-ID: header line

  Main configuration [Alphabetical list of main options], Message processing [Message-ID:]

Microsoft Secure Password Authentication

  Incorporated code, The spa authenticator

MySQL
  lookup type

    File and database lookups [mysql], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  server list

    Main configuration [Alphabetical list of main options]

macro
  compared with named list

    Domain, host, address, and local part lists [Named lists compared with macros]

  description of

    The Exim runtime configuration file [Macros in the configuration file]

  setting on command line

    The Exim command line [Command line options]

mail hub example

  The manualroute router [Manualroute examples]

mail loop prevention

  Main configuration [Alphabetical list of main options]

mailbox
  MMDF format

    The appendfile transport [Private options for appendfile]

  locking, blocking and non-blocking

    The appendfile transport [Private options for appendfile]

  maintenance

    Exim utilities [Mailbox maintenance (exim_lock)]

  multiple

    Generic options for routers, Some common configuration settings [Multiple user mailboxes]

  size warning

    The appendfile transport [Private options for appendfile]

  specifying size of

    The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile]

  symbolic link

    The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending]

  time of last read

    Retry configuration [Retry rules for specific errors]

maildir format

  The appendfile transport [Operational details for delivery to a new file]

  description of

    The appendfile transport [Maildir delivery]

  maildirfolder file

    The appendfile transport [Private options for appendfile]

  maildirsize file

    The appendfile transport [Private options for appendfile], The appendfile transport [Using a maildirsize file]

  quota; directories included in

    The appendfile transport [Private options for appendfile]

  specifying

    The appendfile transport [Private options for appendfile]

  time of last read

    Retry configuration [Retry rules for specific errors]

maildir++

  The appendfile transport [Maildir delivery]

maildirfolder, creating

  The appendfile transport [Private options for appendfile]

mailing lists

  Some common configuration settings [Using Exim to handle mailing lists]

  closed

    Some common configuration settings [Closed mailing lists]

  for Exim users

    Introduction [Mailing lists]

  one-time expansion

    The redirect router [Private options for the redirect router]

  re-expansion of

    Some common configuration settings [Re-expansion of mailing lists]

  syntax errors in

    Some common configuration settings [Syntax errors in mailing lists]

mailq

  The Exim command line [Setting options by program name]

mailstore format

  The appendfile transport [Operational details for delivery to a new file]

  description of

    The appendfile transport [Mailstore delivery]

  specifying

    The appendfile transport [Private options for appendfile]

main configuration

  Main configuration

main log

  Log files

maintaining Exim’s hints database

  Exim utilities [Hints database maintenance]

malware ACL condition

  Access control lists [ACL conditions]

malware scan test

  The Exim command line [Command line options]

manualroute router

  The manualroute router

mask expansion item

  String expansions [Expansion operators]

masked IP address

  String expansions [Expansion operators]

match expansion condition

  String expansions [Expansion conditions]

match_address expansion condition

  String expansions [Expansion conditions]

match_domain expansion condition

  String expansions [Expansion conditions]

match_ip expansion condition

  String expansions [Expansion conditions]

match_local_part expansion condition

  String expansions [Expansion conditions]

maximum

  see also "limit"

  line length

    String expansions [Expansion variables]

md5 expansion item

  String expansions [Expansion operators]

memory
  debugging

    Main configuration [Alphabetical list of main options]

message
  abandoning delivery attempts

    The Exim command line [Command line options]

  adding recipients

    The Exim command line [Command line options]

  age of

    String expansions [Expansion variables]

  changing sender

    The Exim command line [Command line options]

  controlling incoming

    Access control lists

  copying every

    Some common configuration settings [Taking copies of mail]

  discarded

    Log files [Discarded deliveries]

  error

    SMTP processing [Errors in outgoing SMTP]

  forced failure

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

  format

    The Exim command line [Command line options]

  freezing

    System-wide message filtering [Defer, freeze, and fail commands for system filters]

  frozen

    How Exim receives and delivers mail [Life of a message]

  general processing

    Message processing

  header, definition of

    Introduction [Terminology]

  life of

    How Exim receives and delivers mail [Life of a message]

  listing body of

    The Exim command line [Command line options]

  listing header lines

    The Exim command line [Command line options]

  listing in RFC 2822 format

    The Exim command line [Command line options]

  listing message log

    The Exim command line [Command line options]

  log file for

    How Exim receives and delivers mail [Life of a message], Log files [Message log]

  manually discarding

    The Exim command line [Command line options]

  manually freezing

    The Exim command line [Command line options]

  queueing by SMTP connection count

    Main configuration [Alphabetical list of main options]

  queueing by file existence

    Main configuration [Alphabetical list of main options]

  queueing by load

    Main configuration [Alphabetical list of main options]

  queueing by message count

    Main configuration [Alphabetical list of main options]

  queueing certain domains

    Main configuration [Alphabetical list of main options]

  queueing remote deliveries

    Main configuration [Alphabetical list of main options]

  queueing unconditionally

    Main configuration [Alphabetical list of main options]

  reception

    How Exim receives and delivers mail [Receiving mail]

  size

    String expansions [Expansion variables]

  size in queue listing

    The Exim command line [Command line options]

  size issue for transport filter

    The smtp transport [Private options for smtp]

  size limit

    Main configuration [Alphabetical list of main options]

  submission

    Access control lists [Use of the control modifier], Message processing [Submission mode for non-local messages], Message processing [From:], Message processing [Message-ID:], Message processing [Sender:]

  submission, ports for

    The default configuration file [Main configuration settings]

  thawing frozen

    How Exim receives and delivers mail [Life of a message], The Exim command line [Command line options]

  transporting body only

    Generic options for transports

  transporting headers only

    Generic options for transports

message ACL modifier

  Access control lists [ACL modifiers]

  with accept

    Access control lists [ACL verbs]

message body
  binary zero count

    String expansions [Expansion variables]

  in expansion

    String expansions [Expansion variables], String expansions [Expansion variables]

  line count

    String expansions [Expansion variables]

  newlines in variables

    Main configuration [Alphabetical list of main options]

  size

    String expansions [Expansion variables]

  visible size

    Main configuration [Alphabetical list of main options]

message ids
  details of format

    How Exim receives and delivers mail [Message identification]

  with multiple hosts

    Main configuration [Alphabetical list of main options]

message is frozen

  Log files [Reducing or increasing what is logged]

message logs
  disabling

    Main configuration [Alphabetical list of main options]

  preserving

    Main configuration [Alphabetical list of main options]

message reference
  message reference, specifying for local message

    The Exim command line [Command line options]

message sender, constructed by Exim

  How Exim receives and delivers mail [Receiving mail]

millisecond
  logging

    Log files [Reducing or increasing what is logged]

mime_regex ACL condition

  Access control lists [ACL conditions]

mixed-case login names

  Message processing [Case of local parts]

modifiers
  dnsdb

    File and database lookups [Dnsdb lookup modifiers]

monitor

  see "Exim monitor"

msglog directory

  Log files [Message log]

multiline responses, suppressing

  Access control lists [Use of the control modifier]

multiple SMTP deliveries

  The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], Some common configuration settings [Exim on the intermittently connected client host]

multiple SMTP deliveries with TLS

  Encrypted SMTP connections using TLS/SSL [Multiple messages on the same encrypted TCP/IP connection]

multiple mailboxes

  Generic options for routers, Some common configuration settings [Multiple user mailboxes]

multiple spool directories

  Main configuration [Alphabetical list of main options]

### N

NFS

  Generic options for routers

  checking for file existence

    The redirect router [Private options for the redirect router]

  lock file

    The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending]

NIS lookup type

  File and database lookups [nis]

  including support for

    Building and installing Exim [Overriding build-time options for Exim]

NIS+ lookup type

  File and database lookups [nisplus], File and database lookups [More about NIS+]

  including support for

    Building and installing Exim [Overriding build-time options for Exim]

NIS, retrying user lookups

  Main configuration [Alphabetical list of main options]

NTLM authentication

  The spa authenticator

NUL

  see "binary zero"

Nagle algorithm

  Main configuration [Alphabetical list of main options]

name
  of local host

    Main configuration [Alphabetical list of main options]

  of router

    String expansions [Expansion variables]

  of sender

    The Exim command line [Command line options]

  of transport

    String expansions [Expansion variables]

name server for enclosing domain

  File and database lookups [Pseudo dnsdb record types]

named lists

  Domain, host, address, and local part lists [Named lists]

  hiding value of

    Domain, host, address, and local part lists [Named lists]

named pipe (fifo)

  The appendfile transport [Private options for appendfile]

named queues
  deliver from

    The Exim command line [Command line options]

  moving messages

    The Exim command line [Command line options]

  queue runners

    The Exim command line [Command line options]

  resource limit

    Main configuration [Alphabetical list of main options]

  selecting in ACL

    Access control lists [ACL modifiers]

  variable

    String expansions [Expansion variables]

ndbm DBM library

  Building and installing Exim [DBM libraries]

negation
  in expansion condition

    String expansions [Expansion conditions]

  in lists

    Domain, host, address, and local part lists [Negated items in lists]

network interface

  Starting the daemon and the use of network interfaces

new drivers, adding

  Adding new drivers or lookup types

newaliases

  The Exim command line [Setting options by program name]

newline
  as list separator

    The Exim runtime configuration file [Changing list separators]

  in message body variables

    Main configuration [Alphabetical list of main options]

no_xxx

  see "entry for xxx"

non-SMTP messages
  ACLs for

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used], Access control lists [The non-SMTP ACLs]

non-immediate delivery

  The Exim command line [Command line options]

not-QUIT, ACL for

  Main configuration [Alphabetical list of main options]

number of deliveries

  Main configuration [Alphabetical list of main options]

numeric comparison

  String expansions [Expansion conditions]

numerical variables ($1 $2 etc)
  in manualroute router

    The manualroute router [Format of the list of hosts]

numerical variables ($1 $2 etc)

  String expansions [Expansion variables]

  in From line handling

    Message processing [The UUCP From line]

  in cram_md5 authenticator

    The cram_md5 authenticator [Using cram_md5 as a server]

  in errors_copy

    Main configuration [Alphabetical list of main options]

  in external authenticator

    The external authenticator [Using external in a server]

  in gecos_name

    Main configuration [Alphabetical list of main options]

  in if expansion

    String expansions [Expansion conditions]

  in lookup expansion

    String expansions [Expansion items]

  in plaintext authenticator

    The plaintext authenticator [Using plaintext in a server]

  in rewriting rules

    Address rewriting [Rewriting patterns]

  in spa authenticator

    The spa authenticator [Using spa as a server]

nwildlsearch lookup type

  File and database lookups [(n)wildlsearch]

### O

OCSP
  stapling

    Encrypted SMTP connections using TLS/SSL [Revoked certificates]

OpenDMARC

  Incorporated code

OpenSSL

  Encrypted SMTP connections using TLS/SSL

  building Exim with

    Building and installing Exim [Including TLS/SSL encryption support]

OpenSSL
  compatibility

    Main configuration [Alphabetical list of main options]

Oracle
  lookup type

    File and database lookups [oracle], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  server list

    Main configuration [Alphabetical list of main options]

ocsp
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items]

one-time aliasing/forwarding expansion

  The redirect router [Private options for the redirect router]

open files, too many

  Main configuration [Alphabetical list of main options]

opendmarc
  acknowledgment

    Incorporated code

options
  appendfile transport

    The appendfile transport [Private options for appendfile]

  authenticator – extracting

    The Exim command line [Command line options]

  autoreply transport

    The autoreply transport [Private options for autoreply]

  command line

    The Exim command line

  command line; terminating

    The Exim command line [Command line options]

  configuration – extracting

    The Exim command line [Command line options]

  cram_md5 authenticator (client)

    The cram_md5 authenticator [Using cram_md5 as a client]

  cram_md5 authenticator (server)

    The cram_md5 authenticator [Using cram_md5 as a server]

  dnsdb

    File and database lookups [Dnsdb lookup modifiers]

  dnslookup router

    The dnslookup router [Private options for dnslookup]

  external authenticator (client)

    The external authenticator [Using external in a client]

  external authenticator (server)

    The external authenticator [External options]

  generic – definition of

    The Exim runtime configuration file [Format of driver configurations]

  generic; for authenticators

    SMTP authentication [Generic options for authenticators]

  generic; for routers

    Generic options for routers

  generic; for transports

    Generic options for transports

  hiding name of

    The Exim command line [Command line options]

  hiding value of

    The Exim command line [Command line options], The Exim runtime configuration file [Common option syntax]

  iplookup router

    The iplookup router

  lmtp transport

    The lmtp transport

  macro – extracting

    The Exim command line [Command line options]

  manualroute router

    The manualroute router [Private options for manualroute]

  pipe transport

    The pipe transport [Private options for pipe]

  plaintext authenticator (client)

    The plaintext authenticator [Using plaintext in a client]

  plaintext authenticator (server)

    The plaintext authenticator [Plaintext server options]

  queryprogram router

    The queryprogram router

  redirect router

    The redirect router [Private options for the redirect router]

  router – extracting

    The Exim command line [Command line options]

  smtp transport

    The smtp transport [Private options for smtp]

  spa authenticator (client)

    The spa authenticator [Using spa as a client]

  spa authenticator (server)

    The spa authenticator [Using spa as a server]

  tls authenticator (server)

    The tls authenticator

  transport – extracting

    The Exim command line [Command line options]

or expansion condition

  String expansions [Combining expansion conditions]

os.h

  Building and installing Exim [OS-specific header files]

outgoing LMTP over TCP/IP

  SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

outgoing SMTP over TCP/IP

  SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

ownership
  alias file

    The redirect router [Private options for the redirect router]

  configuration file

    The Exim runtime configuration file

  forward file

    The redirect router [Private options for the redirect router]

### P

PAM authentication

  String expansions [Expansion conditions]

PCRE2

  Incorporated code, Regular expressions

  security

    Security considerations [Trust in configuration data]

PCRE2 library

  Building and installing Exim [PCRE2 library]

PIPELINING
  avoiding the use of

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  expected errors

    Main configuration [Alphabetical list of main options]

  suppressing advertising

    Main configuration [Alphabetical list of main options], Access control lists [Use of the control modifier]

PLAIN authentication mechanism

  The plaintext authenticator [The PLAIN authentication mechanism]

PRDR
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used], Access control lists [The SMTP PRDR ACL]

  enabling on server

    Main configuration [Alphabetical list of main options]

  enabling, optional in client

    The smtp transport [Private options for smtp]

  use for per-user SpamAssassin profiles

    Content scanning at ACL time [Calling SpamAssassin from an Exim ACL]

  variable for

    String expansions [Expansion variables], Access control lists [The SMTP PRDR ACL]

PTR record
  in dnsdb lookup

    File and database lookups [More about dnsdb]

Perl

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  calling from Exim

    Embedded Perl

  including support for

    Building and installing Exim [Overriding build-time options for Exim]

  standard output and error

    Embedded Perl [Use of standard output and error by Perl]

  starting the interpreter

    The Exim command line [Command line options], The Exim command line [Command line options]

  taintmode

    Embedded Perl [Setting up so Perl can be used]

  use in expanded string

    String expansions [Expansion items]

  use of warn

    Embedded Perl [Use of standard output and error by Perl]

PostgreSQL lookup type

  File and database lookups [pgsql], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

  server list

    Main configuration [Alphabetical list of main options]

Proxy protocol
  proxy

    Proxies [Inbound proxies]

packet radio

  Generic options for routers []

pam expansion condition

  String expansions [Expansion conditions]

panic log

  Log files

partial matching

  File and database lookups [Partial matching in single-key lookups]

pass_unscanned
  avast

    Content scanning at ACL time [Scanning for viruses]

passwd file

  see "/etc/passwd"

passwd lookup type

  File and database lookups [passwd]

percent hack

  Main configuration [Alphabetical list of main options], Access control lists [Using an ACL to control relaying]

periodic queue running

  The Exim command line [Command line options]

pid (process id)
  in log lines

    Log files, Log files [Reducing or increasing what is logged]

  of current process

    String expansions [Expansion variables]

  of daemon

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options]

  re-use of

    How Exim receives and delivers mail [Message identification]

pid file, path for

  Main configuration [Alphabetical list of main options]

pipe
  duplicated

    The redirect router [Duplicate addresses]

  in redirection list

    The redirect router [Special items in redirection lists]

  named (fifo)

    The appendfile transport [Private options for appendfile]

  tainted data

    The pipe transport

pipe transport

  The pipe transport

  ,

    The pipe transport [Private options for pipe], The pipe transport [Private options for pipe]

  environment for command

    The pipe transport [Environment variables], The pipe transport [Private options for pipe]

  failure of exec

    The pipe transport [Private options for pipe]

  for system filter

    Main configuration [Alphabetical list of main options]

  logging output

    The pipe transport [Private options for pipe]

  path for command

    The pipe transport [How the command is run]

  permitted commands

    The pipe transport [Private options for pipe]

  returned data

    The pipe transport [Returned status and data]

  temporary failure

    The pipe transport [Private options for pipe]

  uid for

    Environment for running local transports [Uids and gids]

  with multiple addresses

    Address batching in local transports

pipelining
  PIPECONNECT

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp]

  early connection

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], Log files [Reducing or increasing what is logged]

  logging outgoing

    Log files [Reducing or increasing what is logged]

pkg-config
  GnuTLS

    Building and installing Exim [Including TLS/SSL encryption support]

  OpenSSL

    Building and installing Exim [Including TLS/SSL encryption support]

  authenticators

    Building and installing Exim [Overriding build-time options for Exim]

  lookups

    Building and installing Exim [Overriding build-time options for Exim]

plaintext authenticator

  The plaintext authenticator

policy control
  access control lists

    Access control lists

  address verification

    Access control lists [Address verification]

  by local scan function

    Adding a local scan function to Exim

  checking access

    Exim utilities [Checking access policy (exim_checkaccess)]

  overview

    How Exim receives and delivers mail [Policy control]

  rejection, returning details

    Main configuration [Alphabetical list of main options]

  relay control

    Access control lists [Using an ACL to control relaying]

  testing

    The Exim command line [Command line options]

port
  465 and 587

    The default configuration file [Main configuration settings]

  for daemon

    Main configuration [Alphabetical list of main options]

  for message submission

    The default configuration file [Main configuration settings]

  iplookup router

    The iplookup router

  logging outgoing remote

    Log files [Reducing or increasing what is logged]

  logging remote

    Log files [Reducing or increasing what is logged]

  receiving TCP/IP

    The Exim command line [Command line options]

  sending TCP/IP

    The smtp transport [Private options for smtp]

preconditions
  checking

    How Exim receives and delivers mail [Running an individual router]

  definition of

    How Exim receives and delivers mail [Processing an address for delivery]

  order of processing

    How Exim receives and delivers mail [Router preconditions]

prefix
  for local part, including in envelope

    Generic options for transports

  for local part, used in router

    Generic options for routers

  for partial matching

    File and database lookups [Partial matching in single-key lookups]

preserving domain in redirection

  The redirect router [Private options for the redirect router]

primary host name

  Domain, host, address, and local part lists [Domain lists]

printing characters

  Main configuration [Alphabetical list of main options]

private options

  The Exim runtime configuration file [Format of driver configurations]

privatekey
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

privilege, running without

  Security considerations [Running Exim without privilege]

privileged user

  Security considerations [Privileged users]

process id

  see "pid"

process log path

  Main configuration [Alphabetical list of main options]

process, querying

  Exim utilities [Finding out what Exim processes are doing (exiwhat)]

procmail

  The pipe transport [Using an external local delivery agent]

protocol, specifying for local message

  The Exim command line [Command line options]

proxy
  Proxy protocol

    Proxies [Inbound proxies]

  SOCKS

    The smtp transport [Private options for smtp], Proxies [Outbound proxies]

  access via

    Proxies

  authentication

    Proxies [Outbound proxies]

  client side

    Proxies [Outbound proxies]

  inbound

    Proxies [Inbound proxies]

  logging proxy address

    Log files [Reducing or increasing what is logged]

  outbound

    Proxies [Outbound proxies]

  proxy protocol

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  server side

    Proxies [Inbound proxies]

proxy support

  Proxies

prvs expansion item

  String expansions [Expansion items]

prvscheck expansion item

  String expansions [Expansion items]

public key for signed distribution

  Introduction [Where to find the Exim distribution]

pwauthd daemon

  Incorporated code

pwcheck daemon

  Incorporated code, String expansions [Expansion conditions]

pwcheck expansion condition

  String expansions [Expansion conditions]

### Q

QUIT, ACL for

  Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used], Access control lists [The QUIT ACL]

query-style lookup
  definition of

    File and database lookups [Lookup types]

  list of types

    File and database lookups [Query-style lookup types]

querying exim information

  The Exim command line [Command line options]

queryprogram router

  The queryprogram router

queue
  count of messages on

    The Exim command line [Command line options]

  definition of

    Introduction [Terminology]

  delay warning

    Main configuration [Alphabetical list of main options]

  delivering specific messages

    The Exim command line [Command line options]

  display in monitor

    The Exim monitor [The queue display]

  double scanning

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  forcing delivery

    The Exim command line [Command line options]

  grepping

    Exim utilities [Selective queue listing (exiqgrep)]

  initial delivery

    The Exim command line [Command line options]

  list of message IDs

    The Exim command line [Command line options]

  listing messages in

    The Exim command line [Command line options]

  local deliveries only

    The Exim command line [Command line options]

  menu in monitor

    The Exim monitor [The queue menu]

  moving messages

    The Exim command line [Command line options]

  named

    The Exim command line [Command line options], The Exim command line [Command line options]

  routing

    The Exim command line [Command line options]

  size of

    String expansions [Expansion variables]

  summary

    Exim utilities [Summarizing the queue (exiqsumm)]

queue ACL modifier

  Access control lists [ACL modifiers]

queue runner

  How Exim receives and delivers mail [Delivery in detail], How Exim receives and delivers mail [Retry mechanism], The Exim command line [Setting options by program name], The Exim command line [Command line options]

  abandoning

    Main configuration [Alphabetical list of main options]

  definition of

    Introduction [Terminology]

  description of operation

    The Exim command line [Command line options]

  detecting when delivering from

    String expansions [Expansion conditions]

  for specific recipients

    The Exim command line [Command line options]

  for specific senders

    The Exim command line [Command line options]

  logging

    Log files [Reducing or increasing what is logged]

  maximum number of

    Main configuration [Alphabetical list of main options]

  processing messages in order

    Main configuration [Alphabetical list of main options]

  starting manually

    The Exim command line [Command line options]

  starting periodically

    The Exim command line [Command line options]

  two phase

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

queue_running expansion condition

  String expansions [Expansion conditions]

queueing
  forcing in ACL

    Access control lists [Use of the control modifier]

queueing incoming messages

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Access control lists [Use of the control modifier]

queues
  named

    String expansions [Expansion variables], Main configuration [Alphabetical list of main options]

quota
  cache, description of

    Access control lists [Quota caching]

  error testing in retry rule

    Retry configuration [Retry rules for specific errors]

  imposed by Exim

    The appendfile transport [Private options for appendfile]

  in maildir delivery

    The appendfile transport [Maildir delivery], The appendfile transport [Using a maildirsize file]

  maildir; directories included in

    The appendfile transport [Private options for appendfile]

  system

    The appendfile transport

  warning threshold

    The appendfile transport [Private options for appendfile]

quota cache
  negative entry expiry, specifying

    Access control lists [Quota caching]

  positive entry expiry, specifying

    Access control lists [Quota caching]

quote expansion item

  String expansions [Expansion operators]

quote_local_part expansion item

  String expansions [Expansion operators]

quoting
  for list

    String expansions [Expansion items]

  hex-encoded unprintable characters

    String expansions [Expansion operators]

  in lookups

    File and database lookups [Quoting lookup data]

  in pipe command

    The pipe transport [How the command is run]

  in regular expressions

    String expansions [Expansion operators]

  in string expansions

    String expansions [Expansion operators]

  lookup-specific

    String expansions [Expansion operators]

### R

RBL

  see "DNS list"

RCPT
  ACL for

    The default configuration file [ACL configuration], Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  maximum number of incoming

    Main configuration [Alphabetical list of main options]

  maximum number of outgoing

    The smtp transport [Private options for smtp]

  rate limiting

    Main configuration [Alphabetical list of main options]

  rewriting argument of

    Address rewriting [The SMTP-time rewriting flag]

  value of $message_size

    String expansions [Expansion variables]

RFC 1413

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  logging timeout

    Log files [Reducing or increasing what is logged]

  query timeout

    Main configuration [Alphabetical list of main options]

RFC 2047

  Building and installing Exim [Support for iconv()], Address rewriting [Flags controlling the rewriting process], Content scanning at ACL time [Scanning MIME parts], Adding a local scan function to Exim [Available Exim functions], Message processing [Constructed addresses]

  binary zero in

    Adding a local scan function to Exim [Available Exim functions]

  decoding

    String expansions [Expansion operators]

  disabling length check

    Main configuration [Alphabetical list of main options]

  expansion operator

    String expansions [Expansion operators]

RFC 3030
  CHUNKING

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], Access control lists [The DATA ACLs]

RFC 7413
  TCP Fast Open

    The smtp transport [Private options for smtp]

Radius

  String expansions [Expansion conditions]

Received: header line

  Message processing [Received:]

  counting

    Main configuration [Alphabetical list of main options]

  customizing

    Main configuration [Alphabetical list of main options]

Redis lookup type

  File and database lookups [redis], File and database lookups [SQL lookups], File and database lookups [More about MySQL, PostgreSQL, Oracle, InterBase, and Redis]

References: header line

  Message processing [References:]

Resent- header line

  Message processing [Resent- header lines]

Resent- header lines
  with -t

    The Exim command line [Command line options]

Return-path: header line

  Generic options for transports, Message processing [Return-path:]

  removing

    Main configuration [Alphabetical list of main options]

Rspamd

  Content scanning at ACL time [Scanning with SpamAssassin and Rspamd]

radius expansion condition

  String expansions [Expansion conditions]

random number

  String expansions [Expansion operators]

randomized host list

  The manualroute router [Private options for manualroute], The smtp transport [Private options for smtp]

rate limiting

  Access control lists [ACL conditions]

  client sending

    Access control lists [Rate limiting incoming messages]

  count

    Access control lists [Ratelimit options for what is being measured]

  counting unique events

    Access control lists [Limiting the rate of different events]

  per_* options

    Access control lists [Ratelimit options for what is being measured]

  per_addr

    Access control lists [Ratelimit options for what is being measured]

  per_cmd

    Access control lists [Ratelimit options for what is being measured]

  per_conn

    Access control lists [Ratelimit options for what is being measured], Access control lists [Ratelimit options for what is being measured], Access control lists [Ratelimit options for what is being measured]

  per_rcpt

    Access control lists [Ratelimit options for what is being measured]

  reading data without updating

    Access control lists [Ratelimit update modes]

  strict and leaky modes

    Access control lists [Ratelimit options for handling fast clients]

  unique

    Access control lists [Ratelimit options for what is being measured]

readfile expansion item

  String expansions [Expansion items]

readsocket expansion item

  String expansions [Expansion items]

receiving mail

  How Exim receives and delivers mail [Receiving mail]

recipient
  ACL checking

    Access control lists [ACL conditions]

  adding

    The Exim command line [Command line options]

  adding in local scan

    Adding a local scan function to Exim [Available Exim variables]

  error

    SMTP processing [Errors in outgoing SMTP]

  extracting from header lines

    The Exim command line [Command line options]

  maximum number

    Main configuration [Alphabetical list of main options]

  removing

    The Exim command line [Command line options]

  removing in local scan

    Adding a local scan function to Exim [Available Exim variables]

  verifying

    Access control lists [ACL conditions]

recipients ACL condition

  Access control lists [ACL conditions]

redirect
  tainted data

    The redirect router [Redirection data], The redirect router [Special items in redirection lists]

redirect router

  The redirect router

redirection

  see "address redirection"

redis lookup type

  File and database lookups [More about Redis]

regex ACL condition

  Access control lists [ACL conditions]

regex submatch variables ($1regex $2regex etc)

  String expansions [Expansion variables]

regular expressions
  content scanning with

    Content scanning at ACL time [Scanning with regular expressions]

  in address list

    Domain, host, address, and local part lists [Address lists]

  in domain list

    Domain, host, address, and local part lists [Domain lists]

  in host list

    Domain, host, address, and local part lists [Host list patterns that match by host name]

  in retry rules

    Retry configuration [Format of retry rules]

  library

    Incorporated code, Regular expressions

  match in expanded string

    String expansions [Expansion conditions]

  quoting

    String expansions [Expansion operators]

  security

    Security considerations [Trust in configuration data]

reject log

  Log files

  disabling

    Main configuration [Alphabetical list of main options]

rejection, fake

  Access control lists [Use of the control modifier]

relaying
  checking control of

    Access control lists [Checking a relay configuration]

  control by ACL

    Access control lists [Using an ACL to control relaying]

  testing configuration

    The Exim command line [Command line options]

reload
  configuration

    The Exim command line [Command line options]

remote delivery, definition of

  Introduction [Terminology]

remove_header ACL modifier

  Access control lists [Removing header lines in ACLs]

removing messages

  The Exim command line [Command line options]

removing recipients

  The Exim command line [Command line options]

repeated redirection expansion

  The redirect router [Repeated redirection expansion]

replacing another MTA

  Building and installing Exim [Replacing another MTA with Exim]

reporting bugs

  Introduction [Bug reports]

require ACL verb

  Access control lists [ACL verbs]

resolver, debugging output

  The Exim command line [Command line options]

restart
  on HUP signal

    Building and installing Exim [Upgrading Exim], The Exim command line [Command line options]

restricting access to features

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router], The redirect router [Private options for the redirect router]

retry
  after long-term failure

    Retry configuration [Long-term failures]

  algorithms

    Retry configuration [Retry parameters]

  condition

    String expansions [Expansion conditions], System-wide message filtering

  configuration testing

    The Exim command line [Command line options]

  configuration, description of

    Retry configuration

  default rule

    The default configuration file [Default retry rule]

  description of mechanism

    How Exim receives and delivers mail [Retry mechanism]

  final cutoff

    The smtp transport [Private options for smtp], Retry configuration [Long-term failures]

  fixed intervals

    Retry configuration [Retry parameters]

  increasing intervals

    Retry configuration [Retry parameters]

  intermittently working deliveries

    Retry configuration [Deliveries that work intermittently]

  interval, maximum

    Retry configuration [Retry parameters]

  limit on interval

    Main configuration [Alphabetical list of main options]

  parameters in rules

    Retry configuration [Retry parameters]

  quota error testing

    Retry configuration [Retry rules for specific errors]

  random intervals

    Retry configuration [Retry parameters]

  rules

    Retry configuration [Format of retry rules]

  rules; sender-specific

    Retry configuration [Retry rules for specified senders]

  specific errors; specifying

    Retry configuration [Retry rules for specific errors]

  time not reached

    Retry configuration, Log files [Other log entries]

  timeout of data

    Retry configuration [Timeout of retry data]

  times

    Exim utilities [Finding individual retry times (exinext)]

return code
  for -bS

    The Exim command line [Command line options]

  for -bm

    The Exim command line [Command line options]

  for -bt

    The Exim command line [Command line options]

  for -bv

    The Exim command line [Command line options]

  for -oee

    The Exim command line [Command line options]

  for -oem

    The Exim command line [Command line options]

  for -oep

    The Exim command line [Command line options]

  for bad configuration

    The Exim runtime configuration file

  from run expansion

    String expansions [Expansion items], String expansions [Expansion variables]

return path

  see "envelope sender"

  changing in transport

    Generic options for transports

  created from Sender:

    Message processing [Sender:]

  definition of

    Introduction [Terminology]

  in submission mode

    Message processing [Submission mode for non-local messages]

reverse DNS lookup

  String expansions [Expansion variables], Main configuration [Alphabetical list of main options], Format of spool files [Format of the -H file]

revocation list

  Encrypted SMTP connections using TLS/SSL [Revoked certificates]

rewriting
  addresses

    How Exim receives and delivers mail [Handling an incoming message], Address rewriting, Message processing [Rewriting addresses]

  at transport time

    Generic options for transports, Address rewriting [When does rewriting happen?]

  bang paths

    Address rewriting [Rewriting examples]

  flags

    Address rewriting [Flags specifying which headers and envelope addresses to rewrite]

  header lines

    The dnslookup router [Private options for dnslookup]

  logging

    Log files [Reducing or increasing what is logged]

  patterns

    Address rewriting [Rewriting patterns]

  replacements

    Address rewriting [Rewriting replacements]

  rules

    Address rewriting [Rewriting rules]

  testing

    The Exim command line [Command line options], Address rewriting [Testing the rewriting rules that apply on input]

  timing of

    Address rewriting [When does rewriting happen?]

  whole addresses

    Address rewriting [Flags controlling the rewriting process]

rfc2047 expansion item

  String expansions [Expansion operators]

rfc2047d expansion item

  String expansions [Expansion operators]

rmail

  The Exim command line [Setting options by program name]

root privilege

  Security considerations [Root privilege]

  running without

    Security considerations [Running Exim without privilege]

router
  IP address translation

    Generic options for routers []

  adding header lines

    Generic options for routers

  carrying on after success

    Generic options for routers []

  case of local parts

    Generic options for routers

  changing address for errors

    Generic options for routers

  checking for local user

    Generic options for routers

  checking senders

    Generic options for routers []

  customized precondition

    Generic options for routers

  customizing cannot route message

    Generic options for routers

  data attached to address

    Generic options for routers

  definition of

    How Exim receives and delivers mail [Processing an address for delivery]

  discarding IP addresses

    Generic options for routers

  fallback hosts

    Generic options for routers

  for verification

    How Exim receives and delivers mail [Processing an address for verification]

  forcing verification failure

    Generic options for routers

  go to after pass

    Generic options for routers

  home directory for

    Generic options for routers

  name

    String expansions [Expansion variables]

  preconditions, order of processing

    How Exim receives and delivers mail [Router preconditions]

  prefix for local part

    Generic options for routers

  removing header lines

    Generic options for routers

  requiring file existence

    Generic options for routers

  restricting to specific domains

    Generic options for routers

  restricting to specific local parts

    Generic options for routers

  result of running

    How Exim receives and delivers mail [Running an individual router]

  running details

    How Exim receives and delivers mail [Running an individual router]

  setting group

    Generic options for routers

  skipping for EXPN

    Generic options for routers

  skipping when address testing

    Generic options for routers

  start at after redirection

    Generic options for routers

  suffix for local part

    Generic options for routers

  timeout

    Generic options for routers

  used only when verifying

    Generic options for routers []

  user for filter processing

    Generic options for routers []

  variables

    String expansions [Expansion variables], Generic options for routers []

routers
  accept

    The accept router

  default

    The default configuration file [Router configuration]

  dnslookup

    The dnslookup router

  ipliteral

    The ipliteral router

  iplookup

    The iplookup router

  manualroute

    The manualroute router

  queryprogram

    The queryprogram router

  redirect

    The redirect router

routing
  by external program

    The queryprogram router

  loops in

    How Exim receives and delivers mail [Delivery in detail], The redirect router [Redirecting to a local mailbox]

  whole queue before delivery

    The Exim command line [Command line options]

rsmtp

  The Exim command line [Setting options by program name]

run expansion item

  String expansions [Expansion items]

runq

  The Exim command line [Setting options by program name]

runtime configuration

  The Exim runtime configuration file

rxquote expansion item

  String expansions [Expansion operators]

### S

SHA-1 hash

  String expansions [Expansion operators], String expansions [Expansion conditions]

SHA-2 hash

  String expansions [Expansion operators]

SHA-256 hash

  String expansions [Expansion operators]

SHA3 hash

  String expansions [Expansion operators]

SIGHUP

  The Exim command line [Command line options], Security considerations [Running Exim without privilege]

SIGUSR1

  Exim utilities [Finding out what Exim processes are doing (exiwhat)]

SIZE
  ESMTP extension

    Generic options for transports, The smtp transport [Private options for smtp]

  ESMTP extension, advertising

    Main configuration [Alphabetical list of main options]

  option on MAIL command

    SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

SIZE option on MAIL command

  SMTP processing [Incoming SMTP messages over TCP/IP]

SMTP
  authentication configuration

    SMTP authentication

  batched incoming

    The Exim command line [Command line options], SMTP processing [Incoming batched SMTP]

  batched outgoing

    SMTP processing [Outgoing batched SMTP]

  batched outgoing; example

    The manualroute router [Manualroute examples]

  batching over TCP/IP

    SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  callout verification

    Access control lists [Callout verification]

  command history

    String expansions [Expansion variables]

  command, argument for

    String expansions [Expansion variables]

  connection backlog

    Main configuration [Alphabetical list of main options]

  connection, ACL for

    Access control lists [Specifying when ACLs are used], Access control lists [The SMTP connect ACL]

  delaying delivery

    The Exim command line [Command line options]

  details policy failures

    Main configuration [Alphabetical list of main options]

  encrypted connection

    Main configuration [Alphabetical list of main options]

  encryption

    Encrypted SMTP connections using TLS/SSL

  error codes

    The redirect router [Special items in redirection lists], The redirect router [Private options for the redirect router], Access control lists [ACL modifiers]

  errors in outgoing

    SMTP processing [Errors in outgoing SMTP]

  host name in responses

    Main configuration [Alphabetical list of main options]

  incoming call count

    Main configuration [Alphabetical list of main options]

  incoming connection count

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  incoming over TCP/IP

    SMTP processing [Incoming SMTP messages over TCP/IP]

  input timeout

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  limiting incoming message count

    Main configuration [Alphabetical list of main options]

  limiting non-mail commands

    Main configuration [Alphabetical list of main options]

  limiting syntax and protocol errors

    Main configuration [Alphabetical list of main options]

  limiting unknown commands

    Main configuration [Alphabetical list of main options]

  listener

    The Exim command line [Command line options]

  local incoming

    SMTP processing [Incoming local SMTP]

  local input

    The Exim command line [Command line options]

  logging confirmation

    Log files [Reducing or increasing what is logged]

  logging connections

    Log files [Reducing or increasing what is logged]

  logging incomplete transactions

    Log files [Reducing or increasing what is logged]

  logging protocol error

    Log files [Reducing or increasing what is logged]

  logging syntax errors

    Log files [Reducing or increasing what is logged]

  multiple deliveries

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The smtp transport [Private options for smtp], Some common configuration settings [Exim on the intermittently connected client host]

  non-mail commands

    SMTP processing [Use of non-mail SMTP commands]

  outgoing over TCP/IP

    SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  output flushing, disabling for callout

    Access control lists [Use of the control modifier], Access control lists [Callout verification]

  output flushing, disabling for delay

    Access control lists [Use of the control modifier]

  passed connection

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], The smtp transport [Private options for smtp], SMTP processing [Outgoing SMTP and LMTP over TCP/IP], Some common configuration settings [Exim on the intermittently connected client host]

  processing details

    SMTP processing

  protocol errors

    SMTP processing [Syntax and protocol errors in SMTP commands]

  rate limiting

    Main configuration [Alphabetical list of main options]

  rewriting malformed addresses

    Address rewriting [The SMTP-time rewriting flag]

  smtps protocol

    The default configuration file [Main configuration settings], Starting the daemon and the use of network interfaces [Support for the submissions (aka SSMTP or SMTPS) protocol], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

  ssmtp protocol

    The default configuration file [Main configuration settings], Starting the daemon and the use of network interfaces [Support for the submissions (aka SSMTP or SMTPS) protocol], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

  submissions protocol

    The default configuration file [Main configuration settings], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

  synchronization checking

    Main configuration [Alphabetical list of main options], Access control lists [Use of the control modifier]

  syntax errors

    SMTP processing [Syntax and protocol errors in SMTP commands]

  syntax errors; logging

    Log files [Reducing or increasing what is logged]

  testing incoming

    The Exim command line [Command line options]

  unknown command; logging

    Log files [Reducing or increasing what is logged]

  unrecognized commands

    SMTP processing [Unrecognized SMTP commands]

  welcome banner

    Main configuration [Alphabetical list of main options]

SMTPS

  Main configuration [Alphabetical list of main options]

SMTPUTF8
  ESMTP extension, advertising

    Main configuration [Alphabetical list of main options]

  ESMTP option

    Internationalisation [MTA operations]

  logging

    Internationalisation [MTA operations]

SNI

  Encrypted SMTP connections using TLS/SSL [Use of TLS Server Name Indication]

  logging

    Log files [Reducing or increasing what is logged]

  observability in client

    String expansions [Expansion variables]

  observability on server

    String expansions [Expansion variables]

  selecting server certificate based on

    Main configuration [Alphabetical list of main options]

  setting in client

    The smtp transport [Private options for smtp]

SOA record
  in dnsdb lookup

    File and database lookups [More about dnsdb]

SOCKS
  proxy

    Proxies [Outbound proxies]

SPA authentication

  Incorporated code

SPF
  ACL condition

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)], DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  best guess

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  lookup expansion

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  verification

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

  verification variables

    DKIM, SPF, SRS and DMARC [SPF (Sender Policy Framework)]

SPF record
  in dnsdb lookup

    File and database lookups [More about dnsdb]

SQL lookup types

  File and database lookups [SQL lookups]

SRS
  decoding

    DKIM, SPF, SRS and DMARC [SRS (Sender Rewriting Scheme)]

  excoding

    DKIM, SPF, SRS and DMARC [SRS (Sender Rewriting Scheme)]

  expansion item

    DKIM, SPF, SRS and DMARC [SRS (Sender Rewriting Scheme)]

  sender rewriting scheme

    DKIM, SPF, SRS and DMARC [SRS (Sender Rewriting Scheme)]

SRV record
  enabling use of

    The dnslookup router [Private options for dnslookup]

  in dnsdb lookup

    File and database lookups [More about dnsdb]

  required to exist

    The dnslookup router [Private options for dnslookup]

SSL

  see "TLS"

SSMTP

  Main configuration [Alphabetical list of main options]

STARTTLS, ACL for

  Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

Samba project

  Incorporated code

Sender: header line

  The Exim command line [Trusted and admin users], Message processing [Sender:], Message processing [Sender:]

  disabling addition of

    Main configuration [Alphabetical list of main options]

  retaining from local submission

    Main configuration [Alphabetical list of main options]

Sendmail compatibility
  -U option ignored

    The Exim command line [Command line options]

  -bi option

    The Exim command line [Command line options]

  -h option ignored

    The Exim command line [Command line options]

  -oA option

    The Exim command line [Command line options]

  -om option ignored

    The Exim command line [Command line options]

  -oo option ignored

    The Exim command line [Command line options]

  -t option

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  8-bit characters

    The Exim command line [Command line options]

  From line

    The Exim command line [Command line options], Message processing [The UUCP From line], Message processing [From:]

  calling Exim as newaliases

    The Exim command line [Setting options by program name]

  command line interface

    Introduction [Calling interface]

Sieve filter

  How Exim receives and delivers mail [User filters]

  capabilities

    The Exim command line [Command line options]

  configuring appendfile

    The appendfile transport [The file and directory options]

  enabling in default router

    The default configuration file [Router configuration]

  enabling use of

    The redirect router [Private options for the redirect router]

  forbidding delivery to a file

    The redirect router [Private options for the redirect router]

  keep facility; disabling

    The redirect router [Private options for the redirect router]

  not available for system filter

    How Exim receives and delivers mail [Delivery in detail], Main configuration [Alphabetical list of main options]

  relative mailbox path handling

    The appendfile transport [The file and directory options]

  specifying in redirection data

    The redirect router [Interpreting redirection data]

  syntax errors in

    The redirect router [Private options for the redirect router]

  testing

    The Exim command line [Command line options]

  vacation directory

    The redirect router [Private options for the redirect router]

  value of $address_file

    String expansions [Expansion variables]

Solaris
  DBM library for

    Building and installing Exim [DBM libraries]

  LDAP

    File and database lookups [More about LDAP]

  PAM support

    String expansions [Expansion conditions]

  flock() support

    The appendfile transport [Private options for appendfile]

  mail command

    The Exim command line [Command line options]

  stopping Exim on

    Building and installing Exim [Stopping the Exim daemon on Solaris]

SpamAssassin

  Content scanning at ACL time [Scanning with SpamAssassin and Rspamd]

saslauthd daemon

  String expansions [Expansion conditions]

saslauthd expansion condition

  String expansions [Expansion conditions]

sasldb2

  File and database lookups [dbmjz]

scanning

  see "content scanning"

security
  MX lookup

    Generic options for routers, Generic options for routers, The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  build-time features

    Security considerations [Building a more hardened Exim]

  command injection attacks

    Security considerations [Running local commands]

  data sources

    Security considerations [Trust in configuration data]

  discussion of

    Security considerations

  local commands

    Security considerations [Running local commands]

  regular expressions

    Security considerations [Trust in configuration data]

seen ACL condition

  Access control lists [ACL conditions], Access control lists [Previously seen user and hosts]

sender
  ACL checking

    Access control lists [ACL conditions], Access control lists [ACL conditions]

  address

    The Exim command line [Command line options], Message processing [The UUCP From line]

  authenticated

    String expansions [Expansion variables]

  changing

    The Exim command line [Command line options]

  constructed by Exim

    How Exim receives and delivers mail [Receiving mail]

  definition of

    Introduction [Terminology]

  gid

    String expansions [Expansion variables]

  host address, specifying for local message

    The Exim command line [Command line options]

  host name, specifying for local message

    The Exim command line [Command line options]

  ident string, specifying for local message

    The Exim command line [Command line options]

  name

    The Exim command line [Command line options]

  setting by untrusted user

    Main configuration [Alphabetical list of main options]

  source of

    The Exim command line [Command line options]

  uid

    String expansions [Expansion variables]

  verifying

    Access control lists [ACL conditions]

  verifying in header

    Access control lists [ACL conditions]

sender_domains ACL condition

  Access control lists [ACL conditions]

sender_retain submission option

  Message processing [Submission mode for non-local messages]

senders ACL condition

  Access control lists [ACL conditions]

serializing connections

  The smtp transport [Private options for smtp]

set ACL modifier

  Access control lists [ACL modifiers]

setuid

  Security considerations [Root privilege]

  installing Exim with

    Building and installing Exim [Installing Exim binaries and scripts]

sg expansion item

  String expansions [Expansion items]

sha1 expansion item

  String expansions [Expansion operators]

sha2 expansion item

  String expansions [Expansion operators]

sha256 expansion item

  String expansions [Expansion operators]

sha3 expansion item

  String expansions [Expansion operators]

shadow transport

  Generic options for transports

signal
  HUP, to restart

    Building and installing Exim [Upgrading Exim], The Exim command line [Command line options]

  to reload configuration

    The Exim command line [Command line options]

signal exit

  The pipe transport [Private options for pipe]

simultaneous deliveries

  Environment for running local transports [Concurrent deliveries]

single-key lookup
  definition of

    File and database lookups [Lookup types]

  list of types

    File and database lookups [Single-key lookup types]

size
  of bounce lines, limit

    Main configuration [Alphabetical list of main options]

  of bounce, limit

    Main configuration [Alphabetical list of main options]

  of mailbox

    The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile]

  of message

    The Exim command line [Command line options], String expansions [Expansion variables], The smtp transport [Private options for smtp], Log files [Logging message reception], Log files [Reducing or increasing what is logged]

  of message, limit

    Main configuration [Alphabetical list of main options], Generic options for transports

  of monitor window

    The Exim monitor [Main action buttons]

skipping faulty addresses

  The redirect router [Private options for the redirect router]

smart host
  example router

    The manualroute router [Manualroute examples], Some common configuration settings [Sending mail to a smart host]

  suppressing queueing

    Using Exim as a non-queueing client

smtp transport

  The smtp transport

smtps protocol

  The default configuration file [Main configuration settings], Starting the daemon and the use of network interfaces [Support for the submissions (aka SSMTP or SMTPS) protocol], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

socket, use of in expansion

  String expansions [Expansion items]

sorting
  a list

    String expansions [Expansion items]

sorting remote deliveries

  Main configuration [Alphabetical list of main options]

source routing
  in IP packets

    Security considerations [IPv4 source routing]

  in email address

    Main configuration [Alphabetical list of main options]

spa authenticator

  The spa authenticator

spam ACL condition

  Access control lists [ACL conditions]

spam scanning

  Content scanning at ACL time [Scanning with SpamAssassin and Rspamd]

  returned variables

    Content scanning at ACL time [Calling SpamAssassin from an Exim ACL]

spf lookup type

  File and database lookups [spf]

spool
  number of messages

    String expansions [Expansion variables]

spool directory
  checking space

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options]

  creating

    Building and installing Exim [Setting up the spool directory]

  definition of

    Introduction [Terminology]

  file formats

    Main configuration [Alphabetical list of main options]

  file locked

    Log files [Other log entries]

  files

    Security considerations [Spool files]

  files that hold a message

    How Exim receives and delivers mail [Handling an incoming message]

  format of files

    Format of spool files

  input sub-directory

    How Exim receives and delivers mail [Handling an incoming message]

  path to

    Main configuration [Alphabetical list of main options]

  split

    Main configuration [Alphabetical list of main options]

spool file is locked

  Log files [Reducing or increasing what is logged]

spool files
  editing

    Format of spool files

  format of

    Format of spool files

sprintf()

  Security considerations [Use of sprintf()]

sqlite
  lookup timeout

    File and database lookups [More about SQLite]

sqlite lookup type

  File and database lookups [sqlite], File and database lookups [More about SQLite]

  lock timeout

    Main configuration [Alphabetical list of main options]

src/EDITME

  Building and installing Exim [Pre-building configuration]

srs_encode expansion item

  DKIM, SPF, SRS and DMARC [SRS (Sender Rewriting Scheme)]

ssmtp protocol

  The default configuration file [Main configuration settings], Starting the daemon and the use of network interfaces [Support for the submissions (aka SSMTP or SMTPS) protocol], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

  outbound

    The smtp transport [Private options for smtp]

stat expansion item

  String expansions [Expansion operators]

statistics

  Exim utilities [Mail statistics (eximstats)]

statvfs function

  The Exim monitor [The stripcharts]

sticky bit

  Building and installing Exim [Testing], The appendfile transport [Private options for appendfile]

str2b64 expansion item

  String expansions [Expansion operators]

string
  case forcing

    String expansions [Expansion operators], String expansions [Expansion operators]

  comparison

    String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions], String expansions [Expansion conditions]

  expansion

    see "expansion"

  format of configuration values

    The Exim runtime configuration file [String values]

  length in expansion

    String expansions [Expansion operators]

  list, definition of

    The Exim runtime configuration file [List construction]

  quoted

    The Exim runtime configuration file [String values]

  testing for IP address

    String expansions [Expansion conditions]

stripchart

  The Exim monitor [The stripcharts]

strlen expansion item

  String expansions [Expansion operators]

subject, logging

  Log files [Reducing or increasing what is logged]

submission fixups, suppressing

  Access control lists [Use of the control modifier]

submission fixups, suppressing (command-line)

  The Exim command line [Command line options]

submission mode

  Access control lists [Use of the control modifier], Message processing [Submission mode for non-local messages], Message processing [From:], Message processing [Sender:]

submissions protocol

  The default configuration file [Main configuration settings], Starting the daemon and the use of network interfaces [Support for the submissions (aka SSMTP or SMTPS) protocol], Encrypted SMTP connections using TLS/SSL [Support for the submissions (aka ssmtp and smtps) protocol]

substr expansion item

  String expansions [Expansion items], String expansions [Expansion operators]

substring extraction

  String expansions [Expansion items], String expansions [Expansion operators]

suffix for local part
  including in envelope

    Generic options for transports

  used in router

    Generic options for routers

symbolic link
  to build directory

    Building and installing Exim [Multiple machine architectures and operating systems]

  to exim binary

    Building and installing Exim [Replacing another MTA with Exim]

  to mailbox

    The appendfile transport [Private options for appendfile], The appendfile transport [Operational details for appending]

  to source files

    Building and installing Exim [The building process]

synchronization checking in SMTP

  Main configuration [Alphabetical list of main options], Access control lists [Use of the control modifier]

syntax of common options

  The Exim runtime configuration file [Common option syntax]

syslog

  Log files [Where the logs are written]

  duplicate log lines; suppressing

    Main configuration [Alphabetical list of main options]

  facility; setting

    Main configuration [Alphabetical list of main options]

  pid

    Main configuration [Alphabetical list of main options]

  process name; set with flag

    The Exim command line [Command line options]

  process name; setting

    Main configuration [Alphabetical list of main options]

  timestamps

    Main configuration [Alphabetical list of main options]

system aliases file

  Building and installing Exim [Installing Exim binaries and scripts]

system filter

  System-wide message filtering

  specifying

    Main configuration [Alphabetical list of main options]

  testing

    The Exim command line [Command line options]

system log

  Log files

### T

TCP Fast Open
  enabling, in client

    The smtp transport [Private options for smtp]

TCP/IP
  logging incoming remote port

    Log files [Reducing or increasing what is logged]

  logging local address and port

    Log files [Reducing or increasing what is logged], Log files [Reducing or increasing what is logged]

  logging outgoing remote port

    Log files [Reducing or increasing what is logged]

  logging proxy address

    Log files [Reducing or increasing what is logged]

  setting listening interfaces

    The Exim command line [Command line options], Starting the daemon and the use of network interfaces

  setting listening ports

    The Exim command line [Command line options], Starting the daemon and the use of network interfaces, Main configuration [Alphabetical list of main options]

  setting outgoing port

    The smtp transport [Private options for smtp]

TCP_NODELAY on listening sockets

  Main configuration [Alphabetical list of main options]

TCP_WRAPPERS_DAEMON_NAME

  Building and installing Exim [Use of tcpwrappers]

TLS
  ALPN

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [ALPN]

  Application Layer Protocol Names

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [ALPN]

  D-H bit count

    Main configuration [Alphabetical list of main options]

  D-H parameters for server

    Main configuration [Alphabetical list of main options]

  Diffie-Hellman minimum acceptable size

    The smtp transport [Private options for smtp]

  EC cryptography

    Main configuration [Alphabetical list of main options]

  OCSP proof file

    Main configuration [Alphabetical list of main options]

  OpenSSL vs GnuTLS

    Encrypted SMTP connections using TLS/SSL [OpenSSL vs GnuTLS]

  SNI

    String expansions [Expansion variables], String expansions [Expansion variables], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [Use of TLS Server Name Indication]

  SSL-on-connect outbound

    The smtp transport [Private options for smtp]

  Server Name Indication

    String expansions [Expansion variables], String expansions [Expansion variables], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [Use of TLS Server Name Indication]

  advertising

    Main configuration [Alphabetical list of main options]

  automatic start

    The Exim command line [Command line options]

  avoiding for certain hosts

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  broken clients

    Main configuration [Alphabetical list of main options]

  certificate status

    Main configuration [Alphabetical list of main options]

  client certificate revocation list

    The smtp transport [Private options for smtp]

  client certificate verification

    Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Encrypted SMTP connections using TLS/SSL [Requesting and verifying client certificates], Access control lists [ACL conditions]

  client certificate, location of

    The smtp transport [Private options for smtp]

  client private key, location of

    The smtp transport [Private options for smtp]

  configuring an Exim client

    Encrypted SMTP connections using TLS/SSL [Configuring an Exim client to use TLS]

  configuring an Exim server

    Encrypted SMTP connections using TLS/SSL [Configuring an Exim server to use TLS]

  esmtp state; remembering

    Main configuration [Alphabetical list of main options]

  including support for TLS

    Building and installing Exim [Including TLS/SSL encryption support]

  logging SNI

    Log files [Reducing or increasing what is logged]

  logging cipher

    Log files [Reducing or increasing what is logged]

  logging peer DN

    Log files [Reducing or increasing what is logged]

  logging session resumption

    Log files [Reducing or increasing what is logged]

  multiple message deliveries

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [Multiple messages on the same encrypted TCP/IP connection]

  on SMTP connection

    Encrypted SMTP connections using TLS/SSL

  passing connection

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  requiring for certain servers

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  requiring specific ciphers

    Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp]

  requiring specific ciphers (OpenSSL)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers in OpenSSL]

  requiring specific ciphers for DANE

    The smtp transport [Private options for smtp]

  resumption

    String expansions [Expansion variables], Main configuration [Alphabetical list of main options], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], Encrypted SMTP connections using TLS/SSL [TLS Resumption]

  revoked certificates

    Encrypted SMTP connections using TLS/SSL [Revoked certificates]

  server certificate hostname verification

    The smtp transport [Private options for smtp]

  server certificate revocation list

    Main configuration [Alphabetical list of main options]

  server certificate verification

    The smtp transport [Private options for smtp], The smtp transport [Private options for smtp], The smtp transport [Private options for smtp]

  server certificate; location of

    Main configuration [Alphabetical list of main options]

  server private key; location of

    Main configuration [Alphabetical list of main options]

  specifying MAC algorithms (GnuTLS)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

  specifying ciphers (GnuTLS)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

  specifying key exchange methods (GnuTLS)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

  specifying priority string (GnuTLS)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

  specifying protocols (GnuTLS)

    Encrypted SMTP connections using TLS/SSL [Requiring specific ciphers or other parameters in GnuTLS]

  use without STARTTLS

    The Exim command line [Command line options]

TTL
  of dns lookup

    File and database lookups [Dnsdb lookup modifiers]

TXT record
  in dnsdb lookup

    File and database lookups [More about dnsdb]

To: header line

  The Exim command line [Command line options]

Tru64-Unix build-time settings

  Building and installing Exim [Overriding build-time options for Exim]

tainted data

  String expansions [Expansion variables], String expansions [Expansion variables], String expansions [Expansion variables], String expansions [Expansion variables], The pipe transport [Private options for pipe]

  de-tainting

    How Exim receives and delivers mail [Router preconditions], File and database lookups [Examples of different lookup syntax], File and database lookups [Lookup types], Domain, host, address, and local part lists [Domain lists], Domain, host, address, and local part lists [Domain lists], Domain, host, address, and local part lists [Domain lists], String expansions, String expansions [Expansion conditions], String expansions [Expansion conditions], Generic options for routers, The appendfile transport [Private options for appendfile], Access control lists [Callout verification]

  definition

    String expansions

  dsearch result

    File and database lookups [dsearch]

  expansion

    String expansions

  in filenames

    The redirect router [Redirection data], The redirect router [Special items in redirection lists], The appendfile transport [The file and directory options]

  in lookups

    File and database lookups [Quoting lookup data]

  in pipe command

    The pipe transport

  message headers

    String expansions [Expansion items]

  quoting for lookups

    File and database lookups [Lookup types]

  single-key lookups

    File and database lookups [Lookup types]

  sqlite file

    File and database lookups [More about SQLite]

tcp_wrappers_daemon_name

  Building and installing Exim [Use of tcpwrappers]

tcpwrappers, building Exim to support

  Building and installing Exim [Use of tcpwrappers]

tdb DBM library

  Building and installing Exim [DBM libraries]

terminology definitions

  Introduction [Terminology]

testing
  ,

    The Exim command line [Command line options]

  addresses

    The Exim command line [Command line options], Generic options for routers

  filter file

    The Exim command line [Command line options]

  forward file

    The Exim command line [Command line options]

  incoming SMTP

    The Exim command line [Command line options]

  installation

    Building and installing Exim [Testing]

  relay control

    The Exim command line [Command line options]

  retry configuration

    The Exim command line [Command line options]

  rewriting

    The Exim command line [Command line options], Address rewriting [Testing the rewriting rules that apply on input]

  string expansion

    The Exim command line [Command line options], The Exim command line [Command line options], The Exim command line [Command line options], String expansions [Testing string expansions]

  system filter

    The Exim command line [Command line options]

  variables in drivers

    Generic options for routers, Generic options for transports

thawing messages

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options], The Exim monitor [The queue menu]

time interval
  decoding

    String expansions [Expansion operators]

  formatting

    String expansions [Expansion operators]

  specifying in configuration

    The Exim runtime configuration file [Time intervals]

time_eval expansion item

  String expansions [Expansion operators]

time_interval expansion item

  String expansions [Expansion operators]

timeout
  LDAP lookup

    File and database lookups [LDAP authentication and control information]

  SQLite

    File and database lookups [More about SQLite]

  dns lookup

    File and database lookups [Dnsdb lookup modifiers], Main configuration [Alphabetical list of main options]

  for RFC 1413 call

    Main configuration [Alphabetical list of main options]

  for SMTP input

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  for local_scan() function

    Main configuration [Alphabetical list of main options]

  for non-SMTP input

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options]

  for transmitted SMTP data accept

    The smtp transport [Private options for smtp]

  for transmitted SMTP data blocks

    The smtp transport [Private options for smtp]

  frozen messages

    Main configuration [Alphabetical list of main options]

  mailbox locking

    The appendfile transport [Private options for appendfile], The appendfile transport [Private options for appendfile]

  of retry data

    Retry configuration [Timeout of retry data]

  of router

    Generic options for routers

  smtp transport command

    The smtp transport [Private options for smtp]

  smtp transport connect

    The smtp transport [Private options for smtp]

timestamps
  millisecond, in logs

    Log files [Reducing or increasing what is logged]

  syslog

    Main configuration [Alphabetical list of main options]

timezone, setting

  Main configuration [Alphabetical list of main options]

tls authenticator

  The tls authenticator

tls_certificate
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

tls_crl
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

tls_ocsp_file
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items]

tls_privatekey
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

tls_require_ciphers
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

tls_verify_certificate
  caching

    Encrypted SMTP connections using TLS/SSL [Caching of static server configuration items], Encrypted SMTP connections using TLS/SSL [Caching of static client configuration items]

tmail

  The pipe transport [Private options for pipe]

too many open files

  Main configuration [Alphabetical list of main options]

top bit

  see "8-bit characters"

tr expansion item

  String expansions [Expansion items]

trailing dot on domain

  Main configuration [Alphabetical list of main options]

transport
  body only

    Generic options for transports

  concurrency limit

    Generic options for transports

  current directory for

    Generic options for transports

  definition of

    How Exim receives and delivers mail [Processing an address for delivery]

  external

    Introduction [Limitations]

  filter

    String expansions [Expansion variables], String expansions [Expansion variables], Generic options for transports, The pipe transport [How the command is run], The smtp transport [Private options for smtp], SMTP processing [Outgoing SMTP and LMTP over TCP/IP]

  filter, timeout

    Generic options for transports

  generic options for

    Generic options for transports

  group; additional

    Generic options for transports

  group; specifying

    Generic options for transports

  header lines only

    Generic options for transports

  header lines; adding

    Generic options for transports

  header lines; removing

    Generic options for transports

  header lines; rewriting

    Generic options for transports

  home directory for

    Generic options for transports

  local

    Generic options for routers, Generic options for routers, Generic options for routers []

  local; address batching in

    Address batching in local transports

  local; current directory for

    Environment for running local transports [Current and home directories]

  local; environment for

    Environment for running local transports

  local; home directory for

    Environment for running local transports [Current and home directories]

  local; uid and gid

    Environment for running local transports [Uids and gids]

  message size; limiting

    Generic options for transports

  name

    String expansions [Expansion variables]

  parallel processes

    Generic options for transports

  return path; changing

    Generic options for transports

  shadow

    Generic options for transports

  user, specifying

    Generic options for transports

transports
  appendfile

    The appendfile transport

  autoreply

    The autoreply transport

  default

    The default configuration file [Transport configuration]

  lmtp

    The lmtp transport

  pipe

    The pipe transport

  smtp

    The smtp transport

trusted groups

  Main configuration [Alphabetical list of main options]

trusted users

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Security considerations [Privileged users]

  definition of

    The Exim command line [Trusted and admin users]

### U

UDP communications

  Access control lists [ACL modifiers]

USE_DB

  Building and installing Exim [DBM libraries], Exim utilities [Making DBM files (exim_dbmbuild)]

USE_GNUTLS

  Building and installing Exim [Including TLS/SSL encryption support]

USE_TCP_WRAPPERS

  Building and installing Exim [Use of tcpwrappers]

UTF-8
  conversion from

    String expansions [Expansion operators]

  expansion

    String expansions [Expansion operators]

  in debug output

    The Exim command line [Command line options]

  in domain name

    Main configuration [Alphabetical list of main options]

UUCP
  From line

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Message processing [The UUCP From line]

  example of router for

    The manualroute router [Manualroute examples]

Unicode

  String expansions [Expansion operators]

uc expansion item

  String expansions [Expansion operators]

uid (user id)
  Exim’s own

    Main configuration [Alphabetical list of main options]

  caller

    String expansions [Expansion variables]

  for queryprogram

    The queryprogram router

  in spool file

    Format of spool files [Format of the -H file]

  local delivery

    Generic options for routers [], Generic options for transports, The pipe transport [Private options for pipe]

  of originating user

    String expansions [Expansion variables]

  system filter

    Main configuration [Alphabetical list of main options], System-wide message filtering [Specifying a system filter]

  unknown caller

    Main configuration [Alphabetical list of main options]

underscore in EHLO/HELO

  Main configuration [Alphabetical list of main options]

unfreezing messages

  The Exim command line [Command line options], Main configuration [Alphabetical list of main options], The Exim monitor [The queue menu]

unknown host name

  Domain, host, address, and local part lists [Host list patterns that match by host name], Domain, host, address, and local part lists [Host list patterns for single-key lookups by host name]

unprivileged delivery

  Main configuration [Alphabetical list of main options]

unprivileged running

  Security considerations [Running Exim without privilege]

unqualified addresses

  Main configuration [Alphabetical list of main options], Main configuration [Alphabetical list of main options], Message processing [Unqualified addresses]

untrusted user setting sender

  Main configuration [Alphabetical list of main options]

upgrading Exim

  Building and installing Exim [Upgrading Exim]

upper casing

  String expansions [Expansion operators]

user
  admin

    Security considerations [Privileged users]

  admin definition of

    The Exim command line [Trusted and admin users]

  trusted

    The Exim command line [Command line options], Main configuration [Alphabetical list of main options], Security considerations [Privileged users]

  trusted definition of

    The Exim command line [Trusted and admin users]

  untrusted setting sender

    Main configuration [Alphabetical list of main options]

user name
  format of

    The Exim runtime configuration file [User and group names]

  maximum length

    Main configuration [Alphabetical list of main options]

utf-8
  utf-8 sequences

    String expansions [Expansion operators]

utf8
  address downconversion

    The smtp transport [Private options for smtp], Internationalisation [MTA operations]

  mail name handling

    Internationalisation

utf8_domain_from_alabel expansion item

  String expansions [Expansion operators]

utf8_domain_to_alabel expansion item

  String expansions [Expansion operators]

utf8_localpart_from_alabel expansion item

  String expansions [Expansion operators]

utf8_localpart_to_alabel expansion item

  String expansions [Expansion operators]

utf8clean expansion item

  String expansions [Expansion operators]

utilities

  Exim utilities

### V

VERP

  Some common configuration settings [Variable Envelope Return Paths (VERP)]

VRFY
  ACL for

    Main configuration [Alphabetical list of main options], Access control lists [Specifying when ACLs are used]

  error text, display of

    The redirect router [Special items in redirection lists]

  processing

    SMTP processing [The VRFY and EXPN commands]

Variable Envelope Return Paths

  Some common configuration settings [Variable Envelope Return Paths (VERP)]

vacation processing

  Some common configuration settings [Simplified vacation processing]

variables

  see "expansion, variables"

variables ($auth1 $auth2 etc)
  in external authenticator

    The external authenticator [External options]

  in tls authenticator

    The tls authenticator

verify ACL condition

  Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions], Access control lists [ACL conditions]

verifying
  EHLO

    Access control lists [ACL conditions]

  HELO

    Access control lists [ACL conditions]

  header names only ASCII

    Access control lists [ACL conditions]

  header syntax

    Access control lists [ACL conditions]

  not blind

    Access control lists [ACL conditions]

  recipient

    Access control lists [ACL conditions]

  redirection while

    Access control lists [Redirection while verifying]

  sender

    Access control lists [ACL conditions]

  sender in header

    Access control lists [ACL conditions]

  suppressing error details

    Access control lists [Sender address verification reporting]

verifying address
  by callout

    Access control lists [Callout verification]

  differentiating failures

    Access control lists [Address verification]

  options for

    Access control lists [Address verification]

  overview

    How Exim receives and delivers mail [Processing an address for verification]

  using -bv

    The Exim command line [Command line options]

version number of Exim

  The Exim command line [Command line options]

  override

    Main configuration [Alphabetical list of main options]

virtual domains

  Some common configuration settings [Virtual domains]

virus scanners
  DrWeb

    Content scanning at ACL time [Scanning for viruses]

  F-Secure

    Content scanning at ACL time [Scanning for viruses]

  Kaspersky

    Content scanning at ACL time [Scanning for viruses], Content scanning at ACL time [Scanning for viruses]

  Sophos and Sophie

    Content scanning at ACL time [Scanning for viruses]

  avast

    Content scanning at ACL time [Scanning for viruses]

  clamd

    Content scanning at ACL time [Scanning for viruses]

  command line interface

    Content scanning at ACL time [Scanning for viruses]

  f-prot6d

    Content scanning at ACL time [Scanning for viruses]

  f-protd

    Content scanning at ACL time [Scanning for viruses]

  mksd

    Content scanning at ACL time [Scanning for viruses]

  simple socket-connected

    Content scanning at ACL time [Scanning for viruses]

virus scanning

  Content scanning at ACL time [Scanning for viruses]

### W

warn ACL verb

  Access control lists [ACL verbs], Access control lists [Adding header lines in ACLs]

  log when skipping

    Log files [Reducing or increasing what is logged]

warn_message_file
  tainted data

    Main configuration [Alphabetical list of main options]

warning of delay

  Main configuration [Alphabetical list of main options]

  customizing the message

    Main configuration [Alphabetical list of main options], Customizing bounce and warning messages [Customizing warning messages]

website

  Introduction [FTP site and websites]

welcome banner for SMTP

  Main configuration [Alphabetical list of main options]

white space
  in configuration file

    The Exim runtime configuration file [Configuration file format]

  in header lines

    String expansions [Expansion items]

  in lsearch key

    File and database lookups [lsearch]

whoson lookup type

  File and database lookups [whoson]

wiki

  Introduction [FTP site and websites]

wildcard lookups

  File and database lookups [Default values in single-key lookups], File and database lookups [Partial matching in single-key lookups]

wildlsearch lookup type

  File and database lookups [(n)wildlsearch]

window size

  The Exim monitor [Main action buttons]

### X

X-Failed-Recipients: header line

  How Exim receives and delivers mail [Permanent delivery failure]

X-windows

  Incorporated code, The Exim monitor

X11 libraries, location of

  Building and installing Exim [Overriding build-time options for Exim]

### Z

zero, binary

  see "binary zero"

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