DOCUMENT:Q266383  10-NOV-2000  [exchange]
TITLE   :XCON: MTA 2026 and Internet Mail Service 3016 Error Messages
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 kbExchange550preSP4fix kbExchange550sp4Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

If you enable message tracking, the following error messages may be logged in
the application event log during periods of high server use:

   Source: MSExchangeMTA: EventId: 2026
   An internal MTA error occurred. Contact Microsoft Technical Support. Unable to
   write to the message tracking log, error '. [BASE XFER-IN 18 40] (16)

   Source: MSExchangeIMC: EventId: 3016
   An error occurred while logging a message tracking record. This does not
   affect message delivery. Verify that message tracking is configured
   correctly.

CAUSE
=====

This behavior can occur if the message transfer agent (MTA) and Internet Mail
Service write message-tracking information (located in the Tracking.log folder
under Exchsrvr) by using the system attendant. Under heavy server use, the
system attendant may run out of the worker thread that writes to the Tracking
log, which leads to the error messages that are logged by the MTA and Internet
Mail Service.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server 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



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 4.

MORE INFORMATION
================

For additional information, click the article number below to view the article
in the Microsoft Knowledge Base:

   Q257348 XCON: 2026 and 3016 Warnings During Periods of High Server Use

Additional query words:

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Keywords          : exc55 kbExchange550preSP4fix kbExchange550sp4Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

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