debugged your code slightly
$to = "s@fizzwizz.net";
$mail_subject = "Test";
$mail_body = "This is a test";
$headers = "From: support@fizzwizz.com";
if(!($mailit = mail($email,$mail_subject,$mail_body,$headers)))
{
echo "your mail could not be sent!";
}
else echo "your mail has been sent!";
(just for benefit of others)
but still doesn't send the mail
do you think admin has disabled this function?