10-14-2007
Quote:
Originally Posted by
kypeswith
i could manage in c++ possibly.. with some guidance but i'm trying to learn some shell programming
Remember "horses for courses", the SMTP protocol used between servers on port 25 is a protocol that requires responses based on logic and state. Shell script is not the language for trying to do this in this situation. You would have better success with C, C++, Java, Perl or Python.
SMTP is an open protocol and you are welcome to use it, as all mail-transfer-agents do.
Also, consider why are you trying to re-invent the wheel, projects such as postfix do an excellent job of managing SMTP both outgoing and incoming in a very flexible manner, allowing you to concentrate on what you are trying to do rather than the nitty-gritties of the SMTP protocol.
Last edited by porter; 10-14-2007 at 06:26 PM..
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LEARN ABOUT DEBIAN
net::smtp::server::relay
Server::Relay(3pm) User Contributed Perl Documentation Server::Relay(3pm)
NAME
Net::SMTP::Server::Relay - A simple relay module for Net::SMTP::Server.
SYNOPSIS
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: $!
");
while($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: $!
");
# 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});
}
DESCRIPTION
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.
AUTHOR AND COPYRIGHT Net::SMTP::Server / SMTP::Server is Copyright(C) 1999, MacGyver (aka Habeeb J. Dihu) <macgyver@tos.net>. ALL RIGHTS
RESERVED.
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.
SEE ALSO
Net::SMTP::Server::Server, Net::SMTP::Server::Client
perl v5.10.1 1999-12-28 Server::Relay(3pm)