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 v5.24.3 2017-12-16 Mail::DKIM::DkPolicy(3)
mail-dkim 0.500.0 - Generated Fri Jan 5 11:01:04 CST 2018