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Q236586: XCON: Mail Flow Stops with MTA Event ID 4287, Error Code 8640

Article: Q236586
Product(s): Microsoft Exchange
Version(s): winnt:5.5
Operating System(s): 
Keyword(s): exc55 EXC55SP3Fix
Last Modified: 30-SEP-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
-------------------------------------------------------------------------------


SYMPTOMS
========

Over particularly loaded slow links and very slow response times, mail flow over
an X.400 Connector may appear to be stopped.

The MTA logs the following event in the application log:

  Event ID: 4287
  Description: Internal error in POP4 with error code 8640.

In Calls.out you can read:

Call-stack for TID 006 (NT:0316) : POP4 DOWN      Busy 0%, stalled on send 
to q/loc 004, normally services q 016


RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For additional information, please see the following article in the
Microsoft Knowledge Base:

  Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

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

Component: Message Transfer Agent (MTA)

+---------------------------+
| File name    | Version    | 
+---------------------------+
| Dbserver.sch | N/A        | 
+---------------------------+
| Dcprods.cat  | N/A        | 
+---------------------------+
| Ems_rid.dll  | 5.5.2646.0 | 
+---------------------------+
| Emsmta.exe   | 5.5.2646.0 | 
+---------------------------+
| Info4log.cfg | N/A        | 
+---------------------------+
| Infoblog.cfg | N/A        | 
+---------------------------+
| Infodlog.cfg | N/A        | 
+---------------------------+
| Infollog.cfg | N/A        | 
+---------------------------+
| Infoplog.cfg | N/A        | 
+---------------------------+
| Infotlog.cfg | N/A        | 
+---------------------------+
| Mtacheck.exe | 5.5.2646.0 | 
+---------------------------+
| Mtamsg.dll   | 5.5.2646.0 | 
+---------------------------+
| P2.xv2       | N/A        | 
+---------------------------+
| X400om.dll   | 5.5.2646.0 | 
+---------------------------+
| X400omv1.dll | 5.5.2646.0 | 
+---------------------------+


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem was first corrected in Exchange Server 5.5 Service
Pack 3.

Additional query words:

======================================================================
Keywords          : exc55 EXC55SP3Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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