Asynchronous MDN

AS2's decoupled return mode, opposed to the synchronous MDN.

Definition

Unlike the synchronous MDN (returned in the HTTP response of the same connection), the asynchronous MDN is sent over a new HTTP, HTTPS or SMTP connection. The sender states where to receive it via Receipt-Delivery-Option; the absence of this header means a synchronous MDN. Useful when processing the message exceeds an HTTP response's timeout.

Origin

Described in sections 7.2 and 7.3 of RFC 4130 (IETF, 2009).

Example in context

Receipt-Delivery-Option: https://partner.example.com/as2/mdn

Related terms

• MDN — the receipt in question.
• Disposition-Notification-Options — related header from the same request.