Debian Configuration :: Tests And Playing Around With Postfix In A Test Squeeze Server?

I'm doing some tests and playing around with postfix in a test squeeze server. What I want to achieve is a postfix mail server using ports 465 and 587 with smtp authentication to send mails. I followed this howto: [URL].. and I'm using a php script with pear functions to test sending emails to a gmail test account of mine. This is the script:

<?php
require_once "Mail.php";
$from = "Webmaster <webmaster@server>";
$to = "My Name <myaccount@gmail.com>";
$subject = "This is sent with pear as a test";
$body = "This is the body of the message";

[Code]...