NAME
   Validate::SPF - Validates SPF text string

VERSION
   version 0.003

SYNOPSIS
       use Validate::SPF qw( validate );

       my $spf_text = 'v=spf1 +a/24 mx mx:mailer.example.com ip4:192.168.0.1/16 -all';

       print $spf_text . "\n";
       print ( validate( $spf_text ) ? 'valid' : 'NOT valid' ) . "\n";

DESCRIPTION
   This module implements basic SPF validation.

   This is ALPHA quality software. The API may change without notification!

FUNCTIONS
 validate
   Parse and validate SPF string..

EXPORTS
   Module does not export any symbols by default.

 check_extra
   Checks extra parameters of the tokens (mechanisms, modifiers). Uses the
   appropriate private function to validate it. Returns the result of
   calling this function, or 0 if no function found.

PRIVATE FUNCTIONS
 _validate_a
   Additional checks for A mechanism.

   The A records can be passed as

       a
       a/<prefix-length>
       a:<domain-name>
       a:<domain-name>/<prefix-length>

   If no *domain-name* given, the current domain is used.

 _validate_mx
   Additional checks for MX mechanism.

   The MX records can be passed as

       mx
       mx/<prefix-length>
       mx:<domain-name>
       mx:<domain-name>/<prefix-length>

   If no *domain-name* given, the current domain is used.

 _validate_ip4
   Additional checks for IP4 mechanism.

   IPv4 addresses can be passed as

       ip4:<IPv4-address>
       ip4:<IPv4-network>/<prefix-length>

   If no *prefix-length* given, the /32 is assumed.

 _validate_ip6
   Additional checks for IP6 mechanism.

   IPv6 addresses can be passed as

       ip6:<IPv6-address>
       ip6:<IPv6-network>/<prefix-length>

   If no *prefix-length* given, the /128 is assumed.

 _validate_ptr
   Additional checks for PTR mechanism.

       ptr
       ptr:<domain>

 _validate_exists
   Additional checks for EXISTS mechanism.

       exists:<domain>

 _validate_include
   Additional checks for INCLUDE mechanism.

       include:<domain>

 _validate_redirect
   Additional checks for REDIRECT modifier.

       redirect=<domain>

 _validate_exp
   Additional checks for EXP modifier.

       exp=<domain>

SEE ALSO
   RFC 7208 <http://tools.ietf.org/html/rfc7208>

   Sender Policy Framework (SPF) for Authorizing Use of Domains in Email,
   Version 1.

AUTHOR
   Anton Gerasimov <[email protected]>

COPYRIGHT AND LICENSE
   This software is copyright (c) 2014 by Anton Gerasimov.

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

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