NAME

       Mail::DMARC::Base - DMARC utility functions

VERSION

       version 1.20230215

METHODS

   is_public_suffix
       Determines if part of a domain is a Top Level Domain (TLD). Examples of TLDs are com, net,
       org, co.ok, am, and us.

       Determination is made by consulting a Public Suffix List. The included PSL is from
       mozilla.org. See http://publicsuffix.org/list/ for more information, and a link to
       download the latest PSL.

   update_psl_file
       Download a new Public Suffix List file from mozilla and update the installed file with the
       new copy.

   has_dns_rr
       Determine if a DNS Resource Record of the specified type exists at the DNS name provided.

   get_resolver
       Returns a (cached) Net::DNS::Resolver object

   set_resolver
       Set the Net::DNS::Resolver object to be used for lookups

   is_valid_ip
       Determines if the supplied IP address is a valid IPv4 or IPv6 address.

   is_valid_domain
       Determine if a string is a legal RFC 1034 or 1101 host name.

       Half the reason to test for domain validity is to shave seconds off our processing time by
       not having to process DNS queries for illegal host names. The other half is to raise
       exceptions if methods are being called incorrectly.

SEE ALSO

       Mozilla Public Suffix List: http://publicsuffix.org/list/

AUTHORS

       •   Matt Simerson <msimerson@cpan.org>

       •   Davide Migliavacca <shari@cpan.org>

       •   Marc Bradshaw <marc@marcbradshaw.net>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2023 by Matt Simerson.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.