Mail() always returns false...

[Kold]

<?php

If(mail("MY ADDRESS IN HERE", "test (b)", "Hello there!")){
    echo "Did send...";
}else{
    echo "Didnt Send";
}

?>

This always returns "Didnt Send" - any idea why? I cant see anything wrong 😕

Thanks!

EDIT
The code was being run on "easyspace.com" - for which you need to include the "From:" info in the header.