I have not gotten to see the files describing Eric's LISTSERV yet, One feature I am interested in is whether or not this list server can be told that if mail is received from a particular origin, it is to be sent out to everyone EXCEPT NOT to the sender. With such a feature, it should be EASY to chain servers together without either looping problems (which this LISTSERV may have other ways of avoiding) or requiring users send mail to a central server.