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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 v5.16.2                                     2009-07-09                          Mail::DKIM::DkPolicy(3)