Net::SMTP::Server::Relay - A simple relay module for Net::SMTP::Server.
use Carp;
use Net::SMTP::Server;
use Net::SMTP::Server::Client;
use Net::SMTP::Server::Relay;
$server = new Net::SMTP::Server('localhost', 25) ||
croak("Unable to handle client connection: $!\n");
while($conn = $server->accept()) {
# We can perform all sorts of checks here for spammers, ACLs,
# and other useful stuff to check on a connection.
# Handle the client's connection and spawn off a new parser.
# This can/should be a fork() or a new thread,
# but for simplicity...
my $client = new Net::SMTP::Server::Client($conn) ||
croak("Unable to handle client connection: $!\n");
# Process the client. This command will block until
# the connecting client completes the SMTP transaction.
$client->process || next;
# In this simple server, we're just relaying everything
# to a server. If a real server were implemented, you
# could save email to a file, or perform various other
# actions on it here.
my $relay = new Net::SMTP::Server::Relay($client->{FROM},
$client->{TO},
$client->{MSG});
}
The Net::SMTP::Server::Relay module implements simple SMTP relaying for use with
the Net::SMTP::Server module. All this module does is to take a given message
and iterate through the list of recipients, doing DNS lookups for the
associated MX record and delivering the messages. This module makes extensive
use of the plethora of other modules already implemented for Perl
(specifically the DNS and Net::SMTP modules in this case), and should give but
a glimpse of the potential for extending the Net::SMTP::Server's functionality
to provide a full-featured SMTP server, native to Perl.
The above example illustrates the use of the
Net::SMTP::Server::Relay modules -- you simply have to instantiate the
module, passing along the sender, recipients, and message. More
formally:
$relay = new Net::SMTP::Server::Relay($from, @to, $msg);
Where $from is the sender,
@to is an array containing the list of recipients,
and $msg is the message to relay.
You may distribute this package under the terms of either the GNU General Public
License or the Artistic License, as specified in the Perl README file.
Net::SMTP::Server::Server, Net::SMTP::Server::Client