NAME

       Mail::DKIM - Signs/verifies Internet mail with DKIM/DomainKey signatures

VERSION

       version 1.20220520

SYNOPSIS

         # verify a message
         use Mail::DKIM::Verifier;

         # create a verifier object
         my $dkim = Mail::DKIM::Verifier->new();

         # read an email from stdin, pass it into the verifier
         while (<STDIN>)
         {
             # remove local line terminators
             chomp;
             s/\015$//;

             # use SMTP line terminators
             $dkim->PRINT("$_\015\012");
         }
         $dkim->CLOSE;

         # what is the result of the verify?
         my $result = $dkim->result;

DESCRIPTION

       This module implements the various components of the DKIM and DomainKeys message-signing
       and verifying standards for Internet mail.  It currently tries to implement these
       specifications:

       RFC4871, for DKIM
       RFC4870, for DomainKeys
       draft-ietf-dmarc-arc-protocol-06, for ARC

       The module uses an object-oriented interface. You use one of two different classes,
       depending on whether you are signing or verifying a message. To sign, use the
       Mail::DKIM::Signer class. To verify, use the Mail::DKIM::Verifier class. Simple, eh?

       Likewise for ARC, use the ARC modules Mail::DKIM::ARC::Signer and
       Mail::DKIM::ARC::Verifier

       If you're sending to test libraries which expect the tags in headers to be sorted, you can
       set $Mail::DKIM::SORTTAGS to a true value, and all created headers will get sorted keys

SEE ALSO

       Mail::DKIM::Signer, Mail::DKIM::Verifier

       Mail::DKIM::ARC::Signer, Mail::DKIM::ARC::Verifier

       http://dkimproxy.sourceforge.net/

       https://github.com/fastmail/authentication_milter

KNOWN BUGS

       Problems passing `make test' seem to usually point at a faulty DNS configuration on your
       machine, or something weird about your OpenSSL libraries.

       The "author signing policy" component is still under construction. The author signing
       policy is supposed to identify the practice of the message author, so you could for
       example reject a message from an author who claims they always sign their messages. See
       Mail::DKIM::Policy.

       Please report bugs to the CPAN RT, or github issue tracker.

       https://rt.cpan.org/Public/Dist/Display.html?Name=Mail-DKIM

       https://github.com/fastmail/mail-dkim/issues

AUTHORS

       •   Jason Long <jason@long.name>

       •   Marc Bradshaw <marc@marcbradshaw.net>

       •   Bron Gondwana <brong@fastmailteam.com> (ARC)

CONTRIBUTORS

       •   Aaron Thompson <dev@aaront.org>

       •   Bron Gondwana <brong@fastmail.fm>

       •   Christian Jaeger <ch@christianjaeger.ch>

       •   Damien MASCRÉ <damienmascre@free.fr>

       •   jasonlong <jasonlong@f38efd27-133c-0410-a3cc-a5f95e9cf04f>

       •   José Borges Ferreira <jose.ferreira@bitsighttech.com>

       •   Marc Bradshaw <marc@fastmailteam.com>

       •   Martijn van de Streek <martijn@vandestreek.net>

       •   Martin H. Sluka <martin@sluka.de>

       •   Mohammad S Anwar <mohammad.anwar@yahoo.com>

THANKS

       Work on ensuring that this module passes the ARC test suite was generously sponsored by
       Valimail (https://www.valimail.com/)

COPYRIGHT AND LICENSE

       •   Copyright (C) 2013 by Messiah College

       •   Copyright (C) 2010 by Jason Long

       •   Copyright (C) 2017 by Standcore LLC

       •   Copyright (C) 2020 by FastMail Pty Ltd

       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.