DELIVERY.COMPLETE means that no listener still requires certified delivery of the message. It is possible that some listeners were previously expecting certified delivery of the message, but have canceled interest in it—either by closing the subscription, or by moving without requiring old messages.
The subject element is the subject name of the certified message. The subject often consists of several elements, so the wildcard character
">" (rather than
"*") is the correct way to match all subjects in this position.
