DOCUMENT:Q152903  29-MAR-1999  [exchange]
TITLE   :XFOR: Mail Connector Dispatch Fails Against Postoffice on Unix
PRODUCT :Microsoft Exchange
PROD/VER:winnt:4.0
OPER/SYS:
KEYWORDS:kbusage

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The information in this article applies to:

 - Microsoft Exchange Server, version 4.0 
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SYMPTOMS
========

When you use the Microsoft Exchange 4.0 MS Mail Connector against an MS Mail
Postoffice that is residing on a UNIX server, it will not dispatch mail from the
Postoffice. Messages will be successfully dispatched into the Postoffice, but
the following event ID will be generated by the Microsoft Exchange PC MTA in the
application event log upon attempting to retrieve outbound mail from the
Postoffice(s) on the UNIX computer:

   Event ID: 4254
   Unable to deliver mail to \\servername\maildata\P1\XXXXXXXX.0lk
   MS Mail Connector (PC) MTA will retry in the next cycle.

CAUSE
=====

Mail is not dispatched from the Postoffice because files on the UNIX system are
written in lower case. The Microsoft Exchange 4.0 Microsoft Mail Connector
requests creation of the file in upper case and expects \P1\<prefix>.0LK
files to be generated. Specifically, the semaphore file is thought to be from
another process when it is not in upper case. As a result, mail will not be
dispatched.


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. This problem was corrected in the latest Microsoft Exchange Service
Pack. For information on obtaining the Service Pack, query on the following word
in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K

Additional query words: LMUX undeliverable

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Keywords          : kbusage 
Technology        : kbExchangeSearch kbExchange400 kbZNotKeyword2
Version           : winnt:4.0

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Copyright Microsoft Corporation 1999.