Return Receipt causes Outlook 2000 crash/exception

[Hansen Ball]

One of our users on Outlook 2000 has received a message
from a user
that requested a return receipt. He moved the message to
his "Deleted
Items" folder, and now cannot delete it or empty the
deleted items.
If he clicks on it, Outlook crashes with an exception
code of
0xC0000005. Attempting to change the message status
to "read" results
in the same crash.

Other info:

- The message was sent by a Mozilla/Gecko client
- In the Deleted Items folder, the message claims to
have no "From:"
info, but in the headers, it clearly does.
- The message has no X-Sender header (though this
shouldn't matter)
- It is a plain text message
- There is no attachment
- It has a header: "Content-Transfer-Encoding: 7bit"

I have searched far and wide, and have found nothing to
indicate that
anyone else is having a similar problem. I'm wondering
if the "read
receipt" is a red herring, and maybe the issue lies
elsewhere.

Any light that anyone can shed on this would be much
appreciated.

Thanks !
Hansen