Greg explained, | I like it that way too, but my students I guess think of a piece | of email as being an object that if it comes back to them means | it didn't get to where it was supposed to go. Greg, in your position I would turn them down instead of accommodating them. If they can't tell the difference between a mailing list distribution and a non-delivery notification, if they can't tell the difference between mail From: themselves and mail From: MAILER-DAEMON, if they can't distinguish a Subject: line that they used on their own outgoing post from "Returned Mail: user unknown" or such, then one of their other teachers is doing a very poor job of educating them. It's a shame that you colleagues are falling down on the job so badly. Considering the ways my posts have been mangled by assorted mailing list software, I would never accept a setup where I didn't see -- or where I had to search to see -- the condition in which my writing was presented to the other members. Perhaps you could teach them that it is a good thing to get back one's own posts is a good thing and that "MAILER-DAEMON" is not any of their names. I ran some small mailing lists for many years with my own homebrew routines, and I offered a lot of format or delivery options, including several that I personally disliked but implemented when one or more members asked for them; but that is one which, had anyone ever asked for it, I'd have flatly turned down. While others may have been not to my taste, I see this one as an outright negative. My honest answer if anyone asks how to do it is that it shouldn't be done.