Microsoft KB Archive/810085

= You can send a Transport Neutral Encapsulation Format message to an external contact through Exchange 2000 when the contact is included in a distribution group =

Article ID: 810085

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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SYMPTOMS
You can send a Transport Neutral Encapsulation Format (TNEF) message that contains attachments to an external contact through Microsoft Exchange 2000 Server. This problem occurs when all the following conditions are true:
 * 1) You create a mail-enabled contact for a user who does not receive mail through Microsoft Exchange. For example, you create a mail-enabled contact for  @hotmail.com.
 * 2) You create a distribution group. Then, you add the external contact that you created in step 1 to the distribution group.
 * 3) You set the distribution group expansion to an Exchange expansion server.
 * 4) You use Microsoft Outlook to send a message that contains attachments to the distribution group that you created in step 2.

TNEF is a Microsoft proprietary method that is used to encode Rich Text Format (RTF) messages that are sent across the Internet. Some e-mail clients do not understand TNEF encoding. Therefore, TNEF should be used only if you are sure that a TNEF message will be received by recipients who use Outlook, Microsoft Windows Messaging, or Microsoft Exchange Client.

If an e-mail client does not understand TNEF, the e-mail client may incorrectly determine that a TNEF message is damaged. By default, Exchange 2000 should not allow TNEF messages to be sent to external e-mail addresses.



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

301378 How to obtain the latest Exchange 2000 Server service pack

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 2000 Server 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:

http://support.microsoft.com/contactus/?ws=support

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 05-Nov-2002  03:44   6.0.6359.0   380,928   Phatcat.dll



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

224817 Transport Neutral Encapsulation Format (TNEF) basics



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.

Additional query words: XADM

Keywords: kbhotfixserver kbqfe kbexchdirectory kbqfe kbfix kbbug KB810085

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