Any varaibles you want to use on that page that are set on the original page need to be declared as globals on the top of the page, and need to be in echo() statements in the email body.
So instead of just:
<BR>Email: $email<br>
you would need to add this to the top:
<?php
global $email;
?>
and then on the page it would be:
<BR>Email: <?php echo($email); ?><br>