#!/usr/bin/perl
#
#
use strict;
use Net::SMTP;

my $DEBUG = 1;

my $smtp;
$smtp = Net::SMTP->new('mymailserver.net', Hello => "myotherserver.net", Debug => 1,);
die "Couldn't connect to server" unless $smtp;
print "Server connection opened\n";

$smtp->auth('myuser', 'test123');

...

##</code><code>##

Net::SMTP>>> Net::SMTP(2.31)
Net::SMTP>>>   Net::Cmd(2.29)
Net::SMTP>>>     Exporter(5.58)
Net::SMTP>>>   IO::Socket::INET(1.29)
Net::SMTP>>>     IO::Socket(1.29)
Net::SMTP>>>       IO::Handle(1.25)
Net::SMTP=GLOB(0xa6fd440)<<< 220 mymailserver.net ESMTP Exim 4.60 Mon, 20 Jul 2009 15:08:52 +0100
Net::SMTP=GLOB(0xa6fd440)>>> EHLO myotherserver.net
Net::SMTP=GLOB(0xa6fd440)<<< 250-mymailserver.net Hello myotherserver.net [10.1.2.70]
Net::SMTP=GLOB(0xa6fd440)<<< 250-SIZE 20971520
Net::SMTP=GLOB(0xa6fd440)<<< 250-PIPELINING
Net::SMTP=GLOB(0xa6fd440)<<< 250-AUTH PLAIN LOGIN
Net::SMTP=GLOB(0xa6fd440)<<< 250-STARTTLS
Net::SMTP=GLOB(0xa6fd440)<<< 250 HELP
Server connection opened
Net::SMTP=GLOB(0xa6fd440)>>> AUTH PLAIN bXl1c2VybXl1c2VydGVzdDEyMw==
Net::SMTP=GLOB(0xa6fd440)<<< 535 Incorrect authentication data

...