DOCUMENT:Q259146  11-NOV-2000  [exchange]
TITLE   :XCON: MTA Slow When Sending to Multiple Servers in the Same Site
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5 SP3
OPER/SYS:
KEYWORDS:exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 SP3 
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SYMPTOMS
========

After you apply Exchange Server 5.5 Service Pack 3 to an Exchange Server
computer in a large multiserver (larger than six servers) site, the time that it
takes to deliver mail to recipients on different servers may increase
dramatically.

CAUSE
=====

This issue can occur because a previous fix in build 2576 of the message
transfer agent (MTA) introduces a blocking issue that negatively affects mail
delivery performance.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server 5.5.
For additional information, click the following article number to view the
article in the Microsoft Knowledge Base:

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



STATUS
======

Microsoft has confirmed that this is a problem in Microsoft Exchange Server
version 5.5 Service Pack 3. This problem was first corrected in Exchange Server
5.5 Service Pack 4.

Additional query words:

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Keywords          : exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix 
Technology        : kbExchangeSearch kbZNotKeyword2 kbExchange550SP3
Version           : winnt:5.5 SP3
Issue type        : kbbug
Solution Type     : kbfix

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