Weird, PHP mail function doesn't work

[zzh0001]

I wrote the simplest php script as following for testing php mail function.
<?php
$send=mail("test@***.org", "My Subject", "hello");
?>
It works on one server but not on another server.

The phpinfo shows the php setting on both servers are exactly same. And on the OS side, the sendmail function works properly on both servers. I mean I can send mail by using sendmail. I am really pissed off right now. Is there some one can hook me up?

Thanks

[planetsim]

This is probably the most talked about issue

What works on one should work on another. This is no way true. In your case not every server allows the PHP function mail to be used. You may need to do this

<?php
phpinfo();
?>

To see if it does or if you cant tell from that email your host.