Mail::DKIM::DkPolicy(3) 				User Contributed Perl Documentation				   Mail::DKIM::DkPolicy(3)

NAME

       Mail::DKIM::DkPolicy - represents a DomainKeys Sender Signing Policy record

DESCRIPTION

       DomainKeys sender signing policies are described in RFC4870(historical). It is a record published in the message sender's (i.e. the person
       who transmitted the message) DNS that describes how they sign messages.

CONSTRUCTORS

   fetch() - fetch a sender signing policy from DNS
	 my $policy = Mail::DKIM::DkPolicy->fetch(
			  Protocol => "dns",
			  Sender => 'joe@example.org',
		      );

       The following named arguments are accepted:

       Protocol
	   always specify "dns"

       Author
	   the "author" of the message for which policy is being checked.  This is the first email address in the "From" header.  According to RFC
	   2822, section 3.6.2, the "From" header lists who is responsible for writing the message.

       Sender
	   the "sender" of the message for which policy is being checked.  This is the first email address in the "Sender" header, or if there is
	   not a "Sender" header, the "From" header.  According to RFC 2822, section 3.6.2, the "Sender" header lists who is responsible for
	   transmitting the message.

       Depending on what type of policy is being checked, both the Sender and Author fields may need to be specified.

       If a DNS error or timeout occurs, an exception is thrown.

       Otherwise, a policy object of some sort will be returned.  If no policy is actually published, then the "default policy" will be returned.
       To check when this happens, use

	 my $is_default = $policy->is_implied_default_policy;

   new() - construct a default policy object
	 my $policy = Mail::DKIM::DkPolicy->new;

   parse() - gets a policy object by parsing a string
	 my $policy = Mail::DKIM::DkPolicy->parse(
			  String => "o=~; t=y"
		      );

METHODS

   apply() - apply the policy to the results of a DKIM verifier
	 my $result = $policy->apply($dkim_verifier);

       The caller must provide an instance of Mail::DKIM::Verifier, one which has already been fed the message being verified.

       Possible results are:

       accept
	   The message is approved by the sender signing policy.

       reject
	   The message is rejected by the sender signing policy.

       neutral
	   The message is neither approved nor rejected by the sender signing policy. It can be considered suspicious.

   flags() - get or set the flags (t=) tag
       A vertical-bar separated list of flags.

   is_implied_default_policy() - is this policy implied?
	 my $is_implied = $policy->is_implied_default_policy;

       If you fetch the policy for a particular domain, but that domain does not have a policy published, then the "default policy" is in effect.
       Use this method to detect when that happens.

   location() - where the policy was fetched from
       DomainKeys policies only have per-domain policies, so this will be the domain where the policy was published.

       If nothing is published for the domain, and the default policy was returned instead, the location will be "undef".

   note() - get or set the human readable notes (n=) tag
       Human readable notes regarding the record. Undef if no notes specified.

   policy() - get or set the outbound signing policy (o=) tag
	 my $sp = $policy->policy;

       Outbound signing policy for the entity. Possible values are:

       "~" The default. The domain may sign some (but not all) email.

       "-" The domain signs all email.

   signall() - true if policy is "-"
   testing() - checks the testing flag
	 my $testing = $policy->testing;

       If nonzero, the testing flag is set on the signing policy, and the verify should not consider a message suspicious based on this policy.

AUTHOR

       Jason Long, <jlong@messiah.edu>

COPYRIGHT AND LICENSE

       Copyright (C) 2006-2009 by Messiah College

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.6 or,
       at your option, any later version of Perl 5 you may have available.

perl v5.16.3							    2009-07-09						   Mail::DKIM::DkPolicy(3)