NAME

       Net::Server::Mail::SMTP - A module to implement the SMTP protocol

SYNOPSIS

           use Net::Server::Mail::SMTP;

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

           my $conn;
           while($conn = $server->accept)
           {
               my $smtp = Net::Server::Mail::SMTP->new( socket => $conn );
               $smtp->set_callback(RCPT => \&validate_recipient);
               $smtp->set_callback(DATA => \&queue_message);
               $smtp->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 $_, @local_domains))
               {
                   return(0, 554, "$recipient: Recipient address rejected: Relay access denied");
               }

               return(1);
           }

           sub queue_message
           {
               my($session, $data) = @_;

               my $sender = $session->get_sender();
               my @recipients = $session->get_recipients();

               return(0, 554, 'Error: no valid recipients')
                   unless(@recipients);

               my $msgid = add_queue($sender, \@recipients, $data)
                 or return(0);

               return(1, 250, "message queued $msgid");
           }

DESCRIPTION

       This class implement the SMTP (RFC 821) protocol. Notice that it don't implement the
       extension mechanism introduce in RFC 2821. You have to use Net::Server::Mail::ESMTP if you
       want this capability.

       This class inherit from Net::Server::Mail. Please see Net::Server::Mail for documentation
       of common methods.

METHODS

       SMTP specific methods.

   get_sender
       Returns the sender of the current session. Return undefined if the reverse path step is
       not complete.

   get_recipients
       Returns the list of recipients supplied by client. Returns undef if forward_path step is
       not engaged. Returns an empty list if not recipients succeed.

EVENTS

       Descriptions of callback who's can be used with set_callback method. All handle takes the
       Net::Server::Mail::SMTP object as first argument and specific callback's arguments.

   HELO
       Takes the hostname given as argument. Engage the reverse path step on success.

           sub helo_handle
           {
               my($session, $hostname) = @_;

               if($hostname eq 'localhost')
               {
                   return(0, 553, q(I don't like this hostname, try again.));
               }

               # don't forgot to return a success reply if you are happy with
               # command's value
               return 1;
           }

   NOOP
       This handler takes no argument

   EXPN
       Command not yet implemented.

       Handler takes address as argument.

   EXPN
       Command not implemented, deprecated by RFC 2821

       Handler takes no argument.

   VRFY
       Command not yet implemented.

       Handler takes address as argument.

   HELP
       Command not yet implemented.

       Handler takes a command name as argument.

   MAIL
       Handler takes address as argument. On success, engage the forward path step and keep the
       given address for later use (get it with get_sender() method).

   RCPT
       Handler takes address as argument. On success, engage the mail data path step and push the
       given address into the recipient list for later use (get it with get_recipients() method).

   SEND
       Command not implemented.

       Handler takes no argument.

   SOML
       Command not implemented.

       Handler takes no argument.

   SAML
       Command not implemented.

       Handler takes no argument.

   DATA
       This handler is called after the final . sent by client. It takes data as argument in a
       scalar reference. You should queue the message and reply with the queue ID.

   DATA-INIT
       This handler is called before enter in the "waiting for data" step. The default success
       reply is a 354 code telling the client to send the mail content.

   DATA-PART
       This handler is called at each parts of mail content sent. It takes as argument a scalar
       reference to the part of data received. It is deprecated to change the contents of this
       scalar.

   RSET
       Handler takes no argument.

       On success, all step are initialized and sender/recipients list are flushed.

   QUIT
       Handler takes no argument.

       Connection is closed after this command. This behavior may change in future, you will
       probably be able to control the closing of connection.

SEE ALSO

       Please, see Net::Server::Mail, Net::Server::Mail::ESMTP and Net::Server::Mail::LMTP.

AUTHOR

       Olivier Poitrey <rs@rhapsodyk.net>

AVAILABILITY

       Available on CPAN.

       anonymous Git repository:

       git clone git://github.com/rs/net-server-mail.git

       Git repository on the web:

       <https://github.com/rs/net-server-mail>

BUGS

       Please use CPAN system to report a bug (http://rt.cpan.org/).

LICENCE

       This library is free software; you can redistribute it and/or modify it under the terms of
       the GNU Lesser General Public License as published by the Free Software Foundation; either
       version 2.1 of the License, or (at your option) any later version.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this
       library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
       Boston, MA 02111-1307 USA

COPYRIGHT

       Copyright (C) 2002 - Olivier Poitrey, 2007 - Xavier Guimard