3.1.5.1.6.2 Processing Regular and Durable Messages
If the <durable/> element in the <services> element is present, or if the <stream> element is present, the protocol MUST save the message to disk.
If the <deliveryReceiptRequest> element is present in the message, the protocol MUST create a delivery receipt (see section 3.1.1.3.1) to acknowledge that the message was received and durably stored. The delivery receipt MUST be addressed to the administration queue of the message sender by setting the <to> element of the delivery receipt to the value of SRMPMessage.AdministationQueueFormatName. The <receivedAt> child element of the <deliveryReceipt> element of the delivery receipt MUST be set to SRMPMessage.ArrivalTime. The <id> child element of the <deliveryReceipt> element of the delivery receipt MUST be set to SRMPMessage.Identifier. The delivery receipt MUST be sent to the remote host as specified in section 3.1.7.2.5.