X400: Non-delivery Reports to Incorrect User by Softswitch EMX (126304)
The information in this article applies to:
- Microsoft Mail Gateway to X.400 3.2
This article was previously published under Q126304 SYMPTOMS
Read receipts and delivery notifications may be sent to the incorrect
address by Softswitch EMX if the unique identifier the Microsoft Mail
Gateway to X.400 places on each message is not unique.
CAUSE
The X400GATE.EXE program uses the message protocol data unit (MPDU)
identifier, an IA5 string that includes the Coordinated Universal Time (UTC
time) as the unique identifier; however, this MPDU is not unique if the
gateway ends the translation of two outgoing X.400 messages in the same
second.
RESOLUTION
A supported fix that corrects this problem is now available from Microsoft,
but has not been fully regression tested and should be applied only to
systems experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to
obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information on support costs, please go to the following
address on the World Wide Web:
The English version of this fix should have the following file attributes
or later:
File Name Version
----------------------
X400gate.exe 3.2.14
This hotfix has been posted to the following Internet location as
X400gy2k.exe:
STATUS
Microsoft has confirmed this to be a problem in Microsoft Mail Gateway to
X.400 version 3.2.
MORE INFORMATION
If a Microsoft Mail Windows client user sends a Mail message to the UNIX
user with Delivery Report and Read Receipt, this bug causes a critical
error on the Softswitch MTA (EMX) side which operates an X.400 backbone
message switch. If a message is forwarded by the EMX, it stores the message
and, if a notification is requested by the sender, waits for the report
If the requested report arrives, the EMX searches the corresponding
original message according to the specified MPDU ID. EMX takes the
originator address of the original message and submits the report to that
address. Because the MPDUs of the original messages are not unique, the EMX
often associates a report to the wrong original message, and thus submits
the report to a different user.
The X.400 gateway has been modified to ensure that the time used is always
unique. The last time used is now stored and compared to the time retrieved
on the next message. If they are the same, the program will continue to ask
for a time until it receives a different time than the one stored. It then
stores this new time value, for comparison on the next message.
Modification Type: | Minor | Last Reviewed: | 3/7/2005 |
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Keywords: | kbbug kbfix KB126304 |
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