XADM: 1993 Private Extension Support on Per-Message Envelope

SYMPTOMS

When you send a message from a DEC All-in-One mail system to a Microsoft Exchange Server with the X.400 Connector, the message may not get to the intended Microsoft Exchange Recipient and the original sender may not receive a Non-Delivery Report (NDR). No errors will be recorded in the Windows NT Event Log.

However, messages sent from Microsoft Exchange to DEC All-In-One recipients flow fine. Additionally, messages sent from Microsoft Exchange to DEC with a read receipt requested will successfully return the read notification back to the Microsoft Exchange sender.