[PHP-WIN] SMTP server response: 530 authentication required

The full error is as follows:

Warning: mail(): SMTP server response: 530 authentication required - for
help go to http://help.yahoo.com/help/us/mail/pop/pop-11.html in c:\program
files\apache group\apache\htdocs\send_simpleform.php on line 10

I receive the error above when I attempt to send mail via a PHP script.
From what I have read the PHP mail() function does not support Authenticated
SMTP,
just uses SMTP on the localhost, or that configured in the PHP.ini file.

What I was reading suggested to use the PEAR functions. Hm... after looking
that the functions PEAR provides PEAR may not work on a WIN machine. OR
maybe I don't understand what I have read. Yep I am learning PHP.

How do I get around this situation?