Author: Stan Ryckman <stanr(_at_)sunspot(_dot_)tiac(_dot_)net>
Original-Date: Tue, 28 Oct 1997 08:53:31 -0500
What you described sounds a lot like the TOPICS feature of LISTSERV (tm)
lists. You might check that out if you're serious. I don't have
an exact URL, but I think you'll find it in the documentation somewhere
Listserv also doesn't pass through some headers which are used in threading
(this is a problem on the Spam-L list)....
Maybe that's configurable.