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net::server::mail::esmtp::xforward

Net::Server::Mail::ESMTP::XFORWARD(3pm) 		User Contributed Perl Documentation		   Net::Server::Mail::ESMTP::XFORWARD(3pm)

NAME

       Net::Server::Mail::ESMTP::XFORWARD - A module to add support to the XFORWARD command in Net::Server::Mail::ESMTP

SYNOPSIS

	   use Net::Server::Mail::ESMTP;

	   my @local_domains = qw(example.com example.org);
	   my $server = new IO::Socket::INET Listen => 1, LocalPort => 25;

	   my $conn;
	   while($conn = $server->accept)
	   {
	       my $esmtp = new Net::Server::Mail::ESMTP socket => $conn;
	       # activate some extensions
	       $esmtp->register('Net::Server::Mail::ESMTP::XFORWARD');
	       # adding some handlers
	       $esmtp->set_callback(RCPT => &validate_recipient);
	       $esmtp->process();
	       $conn->close()
	   }

	   sub validate_recipient
	   {
	       my($session, $recipient) = @_;

	       my $domain;
	       if($recipient =~ /@(.*)>s*$/)
	       {
		   $domain = $1;
	       }

	       if(not defined $domain)
	       {
		   return(0, 513, 'Syntax error.');
	       }
	       elsif(not(grep $domain eq $_, @local_domains) && $session->get_forwarded_addr != "10.1.1.1")
	       {
		   return(0, 554, "$recipient: Recipient address rejected: Relay access denied");
	       }

	       return(1);
	   }

DESCRIPTION

       When using a Net::Server::Mail::ESMTP script inside a MTA and not in front of Internet, values like client IP address are not accessible to
       the script and when the script returns mail to an other instance of smtpd daemon, it logs "localhost" as incoming address. To solve this
       problem, some administrators use the XFORWARD command. This module gives the ability to read and store XFORWARD informations.

       METHODS

       These methods return the values set by the upstream MTA without modifying them so they can be set to undef or "[UNVAILABLE]". See Postfix
       documentation for more.

       o   get_forwarded_values : returns a hash reference containing all values forwarded (keys in lower case).

       o   get_forwarded_name : returns the up-stream hostname. The hostname may be a non-DNS hostname.

       o   get_forwarded_address : returns the up-stream network address. Address information is not enclosed with []. The address may be a non-IP
	   address.

       o   get_forwarded_source : returns LOCAL or REMOTE.

       o   get_forwarded_helo : returns the hostname that the up-stream host announced itself. It may be a non-DNS hostname.

       o   get_forwarded_proto : returns the mail protocol for receiving mail from the up-stream host. This may be an SMTP or non-SMTP protocol
	   name of up to 64 characters.

SEE ALSO

       Net::Server::Mail::ESMTP, <http://www.postfix.org/XFORWARD_README.html>

AUTHOR

       Xavier Guimard, <x.guimard@free.fr>

COPYRIGHT AND LICENSE

       Copyright (C) 2006 by Xavier Guimard

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.6.4 or,
       at your option, any later version of Perl 5 you may have available.

POD ERRORS

       Hey! The above document had some coding errors, which are explained below:

       Around line 167:
	   You forgot a '=back' before '=head1'

perl v5.10.0							    2007-04-09				   Net::Server::Mail::ESMTP::XFORWARD(3pm)

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