Winmail.dat in Ticket Replies

Not having much luck thus far… Can anyone explain why none of the TNEF decoders seem to be able to decode the ticket replies? What is different about the reply than the original email?

FYI -

1.) Initial Ticket creation attachments come through - no problem

2.) Emailing with the Ticket Subject line and attachment - no problem

3.) Replying to ticket result with an attachment results in winmail.dat - problem

Disabling TNEF in Exchange is not an option since several of the mail servers are outside of our control

TIA,
Steve