Microsoft KB Archive/225345

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XCON: MTA Mishandles Deferred Delivery Messages After Daylight Saving Time Changes

Article ID: 225345

Article Last Modified on 1/23/2007


  • Microsoft Exchange Server 4.0 Standard Edition
  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q225345


The Microsoft Exchange Message Transfer Agent (MTA) mishandles deferred delivery messages after the daylight saving time adjustments occur. The MTA will attempt to deliver deferred messages either an hour earlier or later than expected until all of the MTAs in the organization have been cycled. This problem is more prevalent with messages that have been deferred in Outlook using the Options button deferral method. Messages deferred through the Properties option on the File menu do not experience this problem.


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

191014 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: MTA

File name Version
Emsmta.exe 5.5.2580.0
Ems_rid.dll 5.5.2580.0
Mtamsg.dll 5.5.2580.0
X400om.dll 5.5.2580.0
Mtacheck.exe 5.5.2580.0
Dbserver.sch NA
P2.xv2 NA
Infoblog.cfg NA
Infodlog.cfg NA
Infollog.cfg NA
Infotlog.cfg NA NA


All MTAs in the organization can be cycled, which will resolve this problem.


Microsoft has confirmed that this is a problem in Microsoft Exchange Server versions 4.0, 5.0, and 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Keywords: kbbug kbfix kbqfe KB225345