Código PHP:
<form method="post" action="process.php">
Tu Email
: <?php echo $email;?><br>
<input type="hidden" size="40" name="aemail" value="<?php echo $aemail;?>">
<input type="hidden" size="40" name="email" value="<?php echo $email;?>">
<br>
Tu Mensaje
:<br>
<textarea rows="8" cols="30" name="message"></textarea><br><br>
<input type="submit" value="Enviar">
</form>