It is being erased. Users do not realize it until they get a message back
from recipients that they do not know what to do with the attachment. It is
also intermittent. Again, thank you for your time.
Not sure from your description (such as it is) of the problem, but maybe
the following KB article applies to your situation: http://support.microsoft.com/?kbid=278061
"Winmail.dat attachments are included in received e-mail messages in
Outlook 2002 or in Outlook 2003".