If messages are sent using the Exchange family of mail programs
(includes Windows Messaging or Outlook97/98/2000+) and the option to use
Rich Text Format is selected, it puts the RTF message (and any attached
files) in an attachment called WINMAIL.DAT (application/ms-tnef). But
this attachment is useless to most other mail programs. In some mail
programs (e.g. Outlook Express), the attachment won't even be visible.

The Exchange user can turn off the RTF option for messages to selected
recipients. Note that if sending via an Exchange server, the Exchange
server administrator may be overriding the mail client settings. In
this case, the administrator will need to make changes on the server.
In some cases, the Exchange server actually removes the attachments to
some recipients.

For additional information, see the MS-TNEF WINMAIL.DAT Attachments
section of
Decoding Internet Attachments - A Tutorial
http://pages.prodigy.net/michael_san...de.htm#ms-tnef

--

Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm


"chelley55" wrote in message
...
After working fine for two years, I suddenly have a problem receiving
attachments from one particular sender. He sends the email with an
attachment but it shows up on my computer with no attachment. If he
also
sends it to my co-workers, the attachment is there. But when it comes
to me
- no attachment shows up. When his coworker sends the exact same
email with
attachment to me, the attachment is there and I can open it without
problems.
What's going on? Are his attachments being blocked? If that's the
case, how
do I change it and why did it happen? Any help please will be
appreciated!