DOCUMENT:Q194556  20-MAY-2002  [pcmail]
TITLE   :X400: Foreign MTA Cannot Restore Connection Using PConnect
PRODUCT :Microsoft Mail For PC Networks
PROD/VER:MS-DOS:3.2
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Mail Gateway to X.400, version 3.2 
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SYMPTOMS
========

If you send a message through the Microsoft Mail Gateway to X.400 from a foreign
system on which the message transfer agent (MTA) is configured for a checkpoint
size greater than zero, and then the connection ends unexpectedly before the
message is completely transferred, the foreign MTA may attempt to restore the
connection using a PConnect data element. The Microsoft Mail Gateway to X.400
may not allow the connection to be established, and entries similar to the
following may appear in the X.400 log file:

 - 13:17:37 ERROR 1 (RTS): Failed to decode PConnect

 - 13:17:37 ERROR 1 (RTS): Protocol error occurred in state 0

 - 13:17:37 ERROR 3 (RTS): Association aborted

The problem occurs repeatedly until the foreign MTA no longer attempts to restore
the connection. When this occurs, the foreign MTA may no longer consider the
Microsoft Mail Gateway to X.400 computer a valid MTA.

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:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

The English version of this fix should have the following file attributes or
later:

   File Name      Version
   ----------------------
   X400gate.exe   3.2.6

This hotfix has been posted to the following Internet location as X400gy2k.exe:

   ftp://ftp.microsoft.com/bussys/mail/gateways-public/All-Y2K/


WORKAROUND
==========

To prevent this problem from occurring, use one of the following methods:

 - Configure the foreign MTA for a checkpoint size of zero.

-or-

 - Configure the foreign MTA so that it does not attempt to restore the
   connection when the connection ends unexpectedly before the message is
   completely transferred.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Mail Gateway to X.400
version 3.2.

Additional query words:

======================================================================
Keywords          :  
Technology        : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGatex400320
Version           : MS-DOS:3.2
Issue type        : kbbug
Solution Type     : kbfix

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