heres a tip to users of this hack. You can send mails only in plain text by default but by editing the postage.php file you can send mail in HTML too. this is really useful.
In file
postage.php FIND:
Code:
mail($to, $subject, $message, "From: $from");
REPLACE WITH:
Code:
mail($to, $subject, $message, "From: $from" . "MIME-Version: 1.0\n" . "Content-type: text/html; charset=iso-8859-1");