3.1.1.3.1 Delivery Receipts
The receiving QM sends a delivery receipt to the sender as a regular SRMP message that contains the <deliveryReceipt> element. The purpose of a delivery receipt is to notify the sending application that the receiving QM received the sender's message, and in the case of a durable message, stored it to disk. Delivery receipts are sent only if the sending application requested them by adding the <deliveryReceiptRequest> element to the message.
This protocol does not correlate delivery receipts with the original message on the sending side because successful transmission of a protocol message is acknowledged by the "HTTP 200 OK" response of the transport.