loopZendMaildir.php

<?php
// bootstrap the DB access and configs...
// .....

$m = new ParseBounces();
require_once 'Zend/Mail/Storage/Maildir.php';

try {
    $mail = new Zend_Mail_Storage_Maildir(
        array('dirname' => $bounceMaildir)
    );
} catch (Zend_Mail_Exception $e) {
   die ("can't open the maildir");
}
echo $mail->countMessages() . " messages found\n";

foreach ($mail as $message) {
    // is it spam? 
    if ($m->isspam($message)) {
        // delete the message
    }
    
    if ($emails = $m->isBounce($message)) {
         // set a flag for the emails return, 
         // then delete the message
    }
    // we don't know what it is, leave it there.
}