Well, to test this theory, I tried a different "test mail" script on my main domain and it worked fine.

<?php
//define the receiver of the email
$to = '[email protected]';
//define the subject of the email
$subject = 'Test email';
//define the message to be sent. Each line should be separated with \n
$message = "Hello World!\n\nThis is my first mail.";
//define the headers we want passed. Note that they are separated with \r\n
$headers = "From: [email protected]\r\nReply-To: [email protected]";
//send the email
$mail_sent = @mail( $to, $subject, $message, $headers );
//if the message is sent successfully print "Mail sent". Otherwise print "Mail failed"
echo $mail_sent ? "Mail sent" : "Mail failed";
?>

I don't know WHY the basic one doesn't work on my main domain but this one does. Weird, huh.

I tried this script on my second video site "sca-video.com" and it's not working their either. None of the "mail test" scripts are working. I'll have to get a higher level tech or something or find out if I've been blacklisted (my sites are extremely low traffic [almost non-existant] so I don't think I'm blacklisted, but it won't hurt to check).

I'm also going to have to try this on all my domains and send a report to tech support. Bleh.