Problem with mail()...

Anyway, let me give you some background. I downloaded the installer package apache2triad since my every attemt to install PHP and MySQL failed miserably. Anyways, here's what the package included:

Apache version 2.0.50 with ApacheMonitor 2.0.45 and 2.0.50
MySQL 4.0.20 with MyODBC 3.51 and winMYSQLadmin 1.4
OpenSSL 0.9.7c with mod_ssl 2.0.46 and SSLCert 1.0
XMail 1.20 with Xmail Queue Manager 1.47
SlimFTPd 3.15 with PHPsFTd 0.1
Python 2.3.2 with mod_python 3.1.3 , Py2exe 0.5.0, MySQL-python 0.9.2 and Spyce 1.3.12
Perl 5.8.3 with mod_perl 1.99_13 apache2 module , Apache::ASP and PPM 0.18
PHP 5.0.0 with Pear ,Smarty 2.6.3 ,Zend Opt. 2.5.3 , Dbg 2.11.26 and Xdebug 4.3.2
TCL 8.4.5 with TK 8.4 and Vtcl 1.6.0
+ PHPXMail 0.69 ,UebiMiau 2.7.5 , PHPmyadmin 2.5.7 , AWStats 6.1

The only things in that list that I know how to use is the phpMyAdmin, since I don't know how to use XMail, Perl, Python, ASP, And all that crap.

Now then, on to my problem:

Warning: mail() [C:\apache2triad\php\manual\function.mail.html]: SMTP server response: 550 Relay denied in C:\apache2triad\htdocs\mailtest.php on line 3

The Code:

<?php

mail('xxtremegamer9999@aol.com', 'Test Subject', 'Test Message');

?>

Very short code, Just wanted to test it. Anyways, I don't know anything about PHP's mail() function, but I do know that I have it set to on in the PHP config file. So, what's wrong.

*Has Windows XP*

Oh, and I have all this on my computer under localhost, since I don't have a domain. And I have dial-up, so my IP address changes constantly. Just in case that helps...

Also, someone else at another forums said that I needed a program call SendMail. Can someone tell me about it? Thanks in advance.

you will need to configure and run Xmail & configure your php.ini to use it.

currently PHP is trying to send mail without authorisation and your ISP is denying this (as they should) , so make sure that xmail is running & configured & that it is listening on the same port as noted in your php.ini SMTP port setting.

I know nothing of xmail though there is a readme at http://www.xmailserver.org/Readme.html

sendmail is simply a another (far more popular especially on *NIX(the standard *NIX mailserver)) mailserver, you dont need it if you have another (like xmail).

I've read that readme before, but couldn't understand it. Can someone tell me what to look for in both config files to see if they match?

Thanks