Thank you to all of you who answered that question. I have gotten it to work now and would be glad to share the little script that I spent the afternoon playing around with. My only concern now is that it looks like all the mail becomes marked as unread again, and I'm wondering if there's any way to trick the clients into remembering that they have read this mail -- just in a different format. It is only a momentary inconvenience, but we all know how inflexible end-users can be. I will be googling this problem as well.