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4 Internals

    4.1	Filtering

    	$USE_DISTRIBUTE_FILTER

    enables the filtering for distribute mails. This filter checks
    in-coming mails based on %Envelope data. You can set up your own hook
    using %Envelope.

    	$USE_DISTRIBUTE_FILTER

    loads the following filter rule in default.

    	* reject null body
    	* reject one line English words mail
    	  e.g. "help", "unsubscribe"
    	* reject invalid Message-Id mails (may be SPAM mails)
    	* other strange syntaxes

       [options]

    	$FILTER_ATTR_REJECT_COMMAND (default 0)

    	reject '#unsubscribe' like commands

    	$FILTER_ATTR_REJECT_2BYTES_COMMAND (default 0)

    	* reject a line begining with Japanese 2-byte English Characters
    	  e.g. 2-byte "unsubscribe"

    You can use a hook to write your own more complicated filtering rules.
    Attention: in this hook you can refer %Envelope as %e.

    	$DISTRIBUTE_FILTER_HOOK (for post)

    	$COMMAND_FILTER_HOOK (for command)

    In this hook, please write in the following way.

    	* if reject, write the code
    		return 'the reason of rejection';
    	  where this reason is logged in $LOGFILE.
    	* if OK,
    		return '';

    In default fml.pl does not notify the reason of rejection to the
    sender (From: address) since no more information is good for security
    in one sense. If you want to notify the rejection to the sender, set

    	$FILTER_NOTIFY_REJECTION

fml-support: 08182 } } } } 4.3 Reject if a field matches reject patterns

    	&DEFINE_FIELD_PAT_TO_REJECT(field-name, regexp, reason)

    Define regular expression for a field. Please see an examle below.
    XXX "reason" is not yet implemented now.

$START_HOOK = q# if ($USE_DISTRIBUTE_FILTER) { &EnvelopeFilter(*e, 'distribute'); undef $DO_NOTHING; } #; [PREVIOUS CHAPTER] [NEXT CHAPTER]