// set queue prefix "sos" to enalbe dequeueing by JobSchedulerMailDequeueJob
mailOrder.setQueuePraefix(this.getQueuePrefix());
// classic or order driven
if (spooler_task.job().order_queue() == null) {
mailOrder.load(mailOrderId);
rc = this.mailOrderIterator.hasNext();
} else {
order = spooler_task.order();
orderData = (Variable_set) spooler_task.order().payload();