DLPAT (10-digit signed integer)
Type of application that put message on dead-letter (undelivered-message) queue.
This field has the same meaning as the MDPAT field in the message descriptor MQMD (see MQMD - Message descriptor for details).
If it is the queue manager that redirects the message to the dead-letter queue, DLPAT has the value ATQM.
The initial value of this field is 0.