A third-party message transfer agent (MTA) cannot decode an e-mail message that was sent from Exchange Server 5.5

Consider the following scenario. You are running some Microsoft Outlook clients that have the Protek P772 extension installed. These Outlook clients connect to a Microsoft Exchange 2000 server. You send an e-mail message with an attachment to a user who is in a third-party X.400 mail system. For example, the user uses a Nexor X.400 mail system. Then, the e-mail message is sent in the following order:

�	The e-mail message is sent from the Exchange 2000 server to a Microsoft Exchange Server version 5.5.
�	The Exchange 5.5 server sends the e-mail message to the third-party mail system through an X.400 connector.

In this scenario, the third-party message transfer agent (MTA) cannot decode the e-mail message.

Cumulative patch information

To resolve this problem, obtain the November 2004 update rollup for Exchange Server 5.5.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server version 5.5 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later file attributes) 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
   --------------------------------------------------------------
   01-Aug-2001  02:02                     41,325  Dbserver.sch
   16-Sep-2002  00:49                     88,248  Dsadap.xv2
   16-Sep-2002  00:49                     33,049  Edi.xv2
   17-Jul-2003  03:10  5.5.2657.54     1,941,776  Emsmta.exe       
   17-Jul-2003  03:08  5.5.2657.54        69,904  Ems_rid.dll      
   13-Jun-2001  02:05                    133,435  Infoplog.cfg
   17-Jul-2003  03:08  5.5.2657.54        19,728  Maxapia.dll      
   17-Jul-2003  03:08  5.5.2657.54        12,048  Maxapiv1.dll     
   17-Jul-2003  03:10  5.5.2657.54       167,184  Mtacheck.exe     
   17-Jul-2003  03:08  5.5.2657.54       743,696  Mtamsg.dll       
   17-Jul-2003  03:08  5.5.2657.54        16,144  Mtaperf.dll      
   17-Jul-2003  03:08  5.5.2657.54        16,656  Mtxapia.dll      
   17-Jul-2003  03:08  5.5.2657.54        11,536  Mtxapiv1.dll     
   13-Jun-2001  02:06                     50,789  P2.xv2
   17-Sep-2001  03:45                     14,002  P42.tpl
   16-Sep-2002  00:49                     41,222  P772.tpl
   16-Sep-2002  00:49                      9,028  P772.xv2
   29-Aug-2001  03:16                     23,350  Rdi.xv2
   17-Jul-2003  03:08  5.5.2657.54       322,320  X400om.dll       
   17-Jul-2003  03:07  5.5.2657.54        40,208  X400omv1.dll     
   16-Sep-2002  00:49                     31,276  X500dap.tpl

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

For more information about the Protek P772 extension, visit the following Web site: For more information about the Nexor mail system, visit the following Web site: The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.