XCON: A Reply to SMTP Messages That Are Routed Across X.400 Connectors Between Unreplicated Sites Does Not Succeed (305203)

SUMMARY

When you create an X.400 Connector between unreplicated sites with an SMTP address space, you can send SMTP messages by using this connection. However, if the recipient tries to reply to the message, the recipient immediately receives a non-delivery report (NDR), which appears in the following format:

   Your message did not reach some or all of the intended recipients.

      Subject:	Testmail
      Sent:	20.07.01 17:26

   The following recipient(s) could not be reached:

      'TEST1' on 20.07.01 17:26
            The recipient name is not recognized
	
   The MTS-ID of the original message is: c=US;a=;p=SECONDORG;l=MUSICHALL-010720152543Z-3
   MSEXCH:MSExchangeMTA:BAYBERRY:MUSICHALL

MORE INFORMATION

This behavior is by design.

Mail that you send over the connector contains the sender's address in two different formats depending on the connector's settings of the sending server:

If you have enabled the Allow MS Exchange Content option on the Advanced tab in the connector's properties dialog box, the mail contains the sender's distinguished name.
If the option is not enabled, the mail contains the sender's X.400 Connector name.

In the first case, a reply to the message fails because the two sites are not replicated and therefore the distinguished name is not recognized. In the second case, a reply fails because there is no X.400 Connector address space that is specified on the connector.

To work around this issue, disable the Allow MS Exchange Content option on both sides of the connection and specify the appropriate X.400 address spaces.