With the XCF Message Out service, the sender can specify that the system is to provide notification when the message completes. The notification occurs automatically through the message notify user routine. Notification is relevant only if the message-out request is accepted for delivery. XCF does not provide notification for rejected message-out requests.

XCF maintains status information about the request. Even if notification is not requested, this information might be temporarily available to the XCF Message Control service.