PHP

Can PHP use the mail() Function?
This function is supported oly in Linux hosting plans. The mail() function is not supported on our Windows plans due to the fact that there is no accounting procedure for the emails sent using php sites. Therefore, to make sure abusive accounts are not able to freely send spam emails from our Windows servers, we have disabled the mail() function.

Tips:
To send mail through PHP on Windows, you can use the Net_SMTP pair package. The documentation is available at: http://pear.php.net/reference/Net_SMTP-1.1.2/li_Net_SMTP.html