The Disposition header in the MDN receipt.
This property is returned in the message context to determine the reported status of the AS3 message delivery. If the message was processed successfully, you should expect a disposition of
Other possible, but less likely, successful dispositions include:
manual-action/MDN-sent-automatically; processed manual-action/MDN-sent-manually; processed
Otherwise, the disposition will report the error encountered by the AS3 receiver when the message was processed. It is recommended that you read this values in your orchestration to determine the overall status of the AS3 message delivery.
This property is not available in the Sender.