Courier::Filter::Module::SPFout(3pm)			User Contributed Perl Documentation		      Courier::Filter::Module::SPFout(3pm)

NAME

       Courier::Filter::Module::SPFout - Outbound SPF filter module for the Courier::Filter framework

SYNOPSIS

	   use Courier::Filter::Module::SPFout;

	   my $module = Courier::Filter::Module::SPFout->new(
	       match_on 	   => ['fail', 'permerror', 'temperror'],
	       default_response    => $default_response_text,
	       force_response	   => $force_response_text,
	       outbound_ip_addresses
				   => ['129.257.16.1', '2001:6ag:10e1::1'],
	       spf_options	   => {
		   # any Mail::SPF::Server options
	       },

	       logger	   => $logger,
	       inverse	   => 0,
	       trusting    => 0,
	       testing	   => 0,
	       debugging   => 0
	   );

	   my $filter = Courier::Filter->new(
	       ...
	       modules	   => [ $module ],
	       ...
	   );

DESCRIPTION

       This class is a filter module for use with Courier::Filter.  It matches a message if any of the receiving (local) machine's outbound IP
       addresses are not authorized to send mail from the envelope sender's (MAIL FROM) domain according to that domain's DNS SPF (Sender Policy
       Framework) record.  This is outbound SPF checking.

       The point of inbound SPF checking is for message submission agents (MSAs, smarthosts) to protect others against forged envelope sender
       addresses in messages submitted by the MSA's users.

   Constructor
       The following constructor is provided:

       new(%options): returns Courier::Filter::Module::SPFout
	   Creates a new SPFout filter module.

	   %options is a list of key/value pairs representing any of the following options:

	   trusting
	       Disabled.  Since outbound SPF checking, as opposed to inbound SPF checking, is applied to trusted (authenticated) messages only,
	       setting this module to be trusting does not make sense.	This property is thus locked to false.	Also see the description of
	       Courier::Message's "trusted" property .

	   match_on
	       A reference to an array containing the set of SPF result codes which should cause the filter module to match a message.	Possible
	       result codes are "pass", "fail", "softfail", "neutral", "none", "permerror", and "temperror".  See the SPF specification for
	       details on the meaning of those.  If "temperror" is listed, an "temperror" result will by definition never cause a permanent
	       rejection, but only a temporary one.  Defaults to ['fail', 'permerror', 'temperror'].

	       Note:  With early SPF specification drafts as well as the obsolete Mail::SPF::Query module, the "permerror" and "temperror" result
	       codes were known as "unknown" and "error", respectively; the old codes are now deprecated but still supported for the time being.

	   default_response
	       A string that is to be returned as the module's match result in case of a match, that is when the "match_on" option includes the
	       result code of the SPF check (by default when a message fails the SPF check).  However, this default response is used only if the
	       (claimed) envelope sender domain does not provide an explicit response.	See "default_authority_explanation" in Mail::SPF::Server
	       for more information.

	       SPF macro substitution is performed on the default response, just like on explanations provided by domain owners.  If undef,
	       Mail::SPF's default explanation will be used.  Defaults to undef.

	   force_response
	       Instead of merely specifying a default response for cases where the sender domain does not provide an explicit response, you can
	       also specify a response to be used in all cases, even if the sender domain does provide one.  This may be useful if you do not want
	       to confuse your own users with 3rd-party provided explanations when in fact they are only dealing with your server not wanting to
	       relay their messages.  Defaults to undef.

	   outbound_ip_addresses
	       A reference to an array containing the local system's set of outbound IP addresses that will be assumed as the sender IP address in
	       outbound SPF checks.  This set should include all public IP addresses that are used for relaying mail.  By default, automatic
	       discovery of one public IP address that is "en route" to "the internet" is attempted for each of IPv4 and IPv6.	Auto-discovery
	       does not work from behind NATs.

	   spf_options
	       A hash-ref specifying options for the Mail::SPF server object used by this filter module.  See "new" in Mail::SPF::Server for the
	       supported options.

	   All options of the Courier::Filter::Module constructor (except for the trusting option) are also supported.	Please see "new" in
	   Courier::Filter::Module for their descriptions.

   Instance methods
       See "Instance methods" in Courier::Filter::Module for a description of the provided instance methods.

SEE ALSO

       Courier::Filter::Module::SPF, Courier::Filter::Module, Courier::Filter::Overview, Mail::SPF.

       For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview.

REFERENCES

       SPF website (Sender Policy Framework)
	   <http://www.openspf.org>

       SPF specification
	   <http://www.openspf.org/Specifications>

AUTHOR

       Julian Mehnle <julian@mehnle.net>

perl v5.14.2							    2011-12-27				      Courier::Filter::Module::SPFout(3pm)