couldnt we just change that link to something like this
<a href="www.mysite/PowerMessenger/unsubscribe.php?e=' . $email . '">unsubscribe</a>
to grab their email address then have that unsubscribe.php just delete them
maybe unsuscribe.php be set something like this
if (isset($_GET['e'])) {
require_once "connect.php";
$email = $_GET['e'];
$email = strip_tags($email);
$email = stripslashes($email);
$email = mysql_real_escape_string($email);
$sql_replace = mysql_query("DELETE FROM table WHERE email= '$email' LIMIT 1");
if (!$sql_replace) {
echo "Error removing you";
} else {
echo "You have been removed.";
}
mysql_close();
}