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Users receive duplicate messages

View products that this article applies to.

Symptoms

E-mail messages that are sent to users and distribution groups are delivered in duplicate.

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Cause

This problem may occur if both of the following conditions are true:
  • The e-mail message is addressed to a distribution group and to a recipient who is a member of that distribution group
  • The message is addressed to a distribution group that is expanded externally (beyond its own routing group). For example, the message is sent from a Microsoft Exchange 2000 Server mailbox to a distribution group that is expanded to an organization that is using Microsoft Exchange Server 5.5.
This problem may also occur if the original message requires content conversion. For example, the problem may occur if the local recipient has their default message format set to the Rich Text Format (RTF) but the distribution group has its default message format set to plain text.

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Resolution

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   15-Oct-2003  23:31  6.0.6521.0      3,915,776  Cdoex.dll        
   15-Oct-2003  23:25  6.0.6521.0        851,968  Davex.dll        
   15-Oct-2003  23:25  6.0.6521.0         53,248  Davexpc.dll      
   15-Oct-2003  23:22  6.0.6521.0        131,072  Drviis.dll       
   15-Oct-2003  23:22  6.0.6521.0        577,536  Dsaccess.dll     
   15-Oct-2003  22:33  6.0.6521.0        184,320  Dscmsg.dll       
   15-Oct-2003  22:33  6.0.6521.0        962,560  Emsmdb32.dll     
   15-Oct-2003  23:25  6.0.6521.0      2,179,072  Ese.dll          
   15-Oct-2003  23:25  6.0.6521.0         40,960  Eseperf.dll      
   09-Sep-2003  02:18                      6,991  Eseperf.hxx
   15-Oct-2003  23:25                    391,634  Eseperf.ini
   15-Oct-2003  23:31  6.0.6521.0      3,575,808  Excdo.dll        
   15-Oct-2003  23:22  6.0.6521.0        262,144  Exmime.dll       
   15-Oct-2003  23:25  6.0.6521.0        143,360  Exodbesh.dll     
   15-Oct-2003  23:25  6.0.6521.0         57,344  Exodbpc.dll      
   15-Oct-2003  23:25  6.0.6521.0        200,704  Exodbprx.dll     
   15-Oct-2003  23:25  6.0.6521.0      2,179,072  Exoledb.dll      
   15-Oct-2003  23:20  6.0.6521.0         81,920  Exosal.dll       
   15-Oct-2003  23:25  6.0.6521.0        307,200  Exprox.dll       
   15-Oct-2003  22:36  6.0.6521.0        143,360  Exschema.exe     
   15-Oct-2003  23:25  6.0.6521.0        315,392  Exsmtp.dll       
   15-Oct-2003  22:38  6.0.6521.0        675,840  Exwform.dll      
   15-Oct-2003  23:23  6.0.6521.0         40,960  Jcb.dll          
   15-Oct-2003  22:18  6.0.6521.0        745,472  Mapi32.dll       
   15-Oct-2003  22:13  6.0.6521.0         49,152  Mdbevent.dll     
   15-Oct-2003  22:30  6.0.6521.0      2,285,568  Mdbmsg.dll       
   15-Oct-2003  22:15  6.0.6521.0         32,768  Mdbrole.dll      
   15-Oct-2003  23:23  6.0.6521.0         24,576  Mdbtask.dll      
   15-Oct-2003  23:19  6.0.6521.0         94,208  Peexch50.dll     
   15-Oct-2003  23:20  6.0.6521.0        397,312  Phatcat.dll      
   15-Oct-2003  23:23  6.0.6521.0        532,480  Reapi.dll        
   15-Oct-2003  23:25  6.0.6521.0        311,296  Resvc.dll        
   15-Oct-2003  23:21  6.0.6521.0      4,657,152  Store.exe        
   15-Oct-2003  22:38  6.0.6521.0      3,735,552  Wmtemplates.dll

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

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References

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

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Keywords: KB820735, kbbug, kbfix, kbqfe, kbexchange2000presp4fix, kbqfe, kbhotfixserver, kbautohotfix

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Article Info
Article ID : 820735
Revision : 7
Created on : 10/26/2006
Published on : 10/26/2006
Exists online : False
Views : 311