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

my $smtp = Net::SMTP->new('smtp.xxxxx.com', Port    => 25, Timeout => 20, Debug   => 1 );

my $sender = my $user = 'username@xxxxx.com';
my $password = 'xxxxxxxx';
print "Trying to authenticate..";
$smtp->auth( $user, $password ) or die "could not authenticate\n";

my $receiver = 'username@xxxxx.com';
$smtp->mail( $sender );
$smtp->to( $receiver );
$smtp->data();
$smtp->datasend( "To: $receiver\n" );
$smtp->datasend( "From: $sender\n" );
$smtp->datasend( "Content-Type: text/html\n" );
$smtp->datasend( "Subject: Testing Net::SMTP" );
$smtp->datasend( "\n" );
$smtp->datasend( 'The body of the email' );
$smtp->dataend();
$smtp->message();
$smtp->quit();

##</code><code>##

Net::SMTP>>> Net::SMTP(3.10)
Net::SMTP>>>   Net::Cmd(3.10)
Net::SMTP>>>     Exporter(5.72)
Net::SMTP>>>   IO::Socket::IP(0.38)
Net::SMTP>>>     IO::Socket(1.38)
Net::SMTP>>>       IO::Handle(1.36)
Net::SMTP=GLOB(0x4b6c10)<<< 220 smtp.xxxxx.com ESMTP
Net::SMTP=GLOB(0x4b6c10)>>> EHLO localhost.localdomain
Net::SMTP=GLOB(0x4b6c10)<<< 250-smtp.xxxxx.com
Net::SMTP=GLOB(0x4b6c10)<<< 250-8BITMIME
Net::SMTP=GLOB(0x4b6c10)<<< 250-SIZE 20971520
Net::SMTP=GLOB(0x4b6c10)<<< 250 STARTTLS
could not authenticate
Trying to authenticate..