<?php
// Always set content-type when sending HTML email
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=iso-8859-1" . "\r\n";
$headers .= "From: webmaster@yourdomain.com \r\n";
$from    = "webmaster@yourdomain.com";
mail('support@yourdomain.com', 'test message' , 'this is the test message', $headers, "-f ".$from);
echo "Mail Sent.";