"Byron C. Mayes" wrote:

> I think the header is:
>
>           Disposition-Notification-To:
>
> if that helps. I'm assuming (perhaps wrongly) that's a standard header
> because Eudora recognizes it immediately (only Eudora *asks* if I want to
> send notification).

Netscape Communicator (4.x) does as well.

Jeff