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:
- 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 user@hotmail.com.
- You create a distribution group. Then, you add the external
contact that you created in step 1 to the distribution group.
- You set the distribution group expansion to an Exchange
expansion server.
- 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.
RESOLUTION
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:
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