mail sent but not received?!

Hi, I've been pulling my hair out over this problem for a while... ---------------- <?php $msg = "Hi, this is a test"; $to = "me@my.edu"; $sbj = "test message from my.edu"; $rev = mail($to,$sbj,$msg); echo "mail from my.edu result is $rev"; ?> -------------- Since the result of the mail() returned is 1, the message should have been delivered fine. but I did not get anything. Where can I look for more clues of what the problem might be, like possible log, or turn on some debug level in php? I've also tried mail($to,$sbj,$msg, "-f me@my.edu"), no workie either. Any help would be greatly appreciated! Bing