mail::dkim::publickey(3) [mojave man page]

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

CONSTRUCTOR

   fetch() - retrieve a public key record from DNS
	 my $public_key = Mail::DKIM::PublicKey->fetch(
			     Protocol => "dns",
			     Selector => "brisbane",
			     Domain => "example.com",
			   );

       If the public key is found, a Mail::DKIM::PublicKey object is returned, representing the information found in DNS.  If the public key does
       not exist in DNS, then "undef" is returned.  If a DNS error occurs while fetching the key, then this method will "die".	If the public key
       was found, but is not valid (e.g. it is "revoked"), then this method will "die".

METHODS

   granularity() - get or set the granularity (g=) field
	 my $g = $public_key->granularity;

	 $public_key->granularity("*");

       Granularity of the key. The value must match the Local-part of the effective "i=" tag of the DKIM-Signature header field.  The granularity
       is a literal value, or a pattern with a single '*' wildcard character that matches zero or more characters.

       If no granularity is defined, then the default value, '*', will be returned.

perl v5.18.2							    2013-02-07						  Mail::DKIM::PublicKey(3)

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

NAME

       Mail::DKIM::DNS - performs DNS queries for Mail::DKIM

DESCRIPTION

       This is the module that performs DNS queries for Mail::DKIM.

CONFIGURATION

       This module has a couple configuration settings that the caller may want to use to customize the behavior of this module.

   $Mail::DKIM::DNS::TIMEOUT
       This global variable specifies the maximum amount of time (in seconds) to wait for a single DNS query to complete. The default is 10.

   Mail::DKIM::DNS::resolver()
       Use this global subroutine to get or replace the instance of Net::DNS::Resolver that Mail::DKIM uses. If set to undef (the default), then a
       brand new default instance of Net::DNS::Resolver will be created the first time a DNS query is needed.

       You will call this subroutine if you want to specify non-default options to Net::DNS::Resolver, such as different timeouts, or to enable
       use of a persistent socket. For example:

	 # first, construct a custom DNS resolver
	 my $res = Net::DNS::Resolver->new(
			   udp_timeout => 3, tcp_timeout => 3, retry => 2,
			);
	 $res->udppacketsize(1240);
	 $res->persistent_udp(1);

	 # then, tell Mail::DKIM to use this resolver
	 Mail::DKIM::DNS::resolver($res);

   Mail::DKIM::DNS::enable_EDNS0()
       This is a convenience subroutine that will construct an appropriate DNS resolver that uses EDNS0 (Extension mechanisms for DNS) to support
       large DNS replies, and configure Mail::DKIM to use it. (As such, it should NOT be used in conjunction with the resolver() subroutine
       described above.)

	 Mail::DKIM::DNS::enable_EDNS0();

       Use of EDNS0 is recommended, since it reduces the need for falling back to TCP when dealing with large DNS packets. However, it is not
       enabled by default because some Internet firewalls which do deep inspection of packets are not able to process EDNS0-enabled packets. When
       there is a firewall on a path to a DNS resolver, the EDNS0 feature should be specifically tested before enabling.

AUTHOR

       Jason Long, <jlong@messiah.edu>

COPYRIGHT AND LICENSE

       Copyright (C) 2006-2007, 2012-2013 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 v5.18.2							    2013-02-07							Mail::DKIM::DNS(3)