You can't make LISTSERV use a domain in the Sender: for all lists, but you can, on a list-by-list basis, by coding the Sender= keyword in the list header. The syntax is: Sender= List | None | "address" The default is List, meaning <listname@listserv-node>. For the last form, the quotes are required, as in Sender="[log in to unmask]". WARNING: SETTING THE SENDER: TO SOMETHING OTHER THAN THE ACTUAL LIST ADDRESS IN <USER@NODE> FORM MAY BREAK LISTSERV'S BUILTIN MAIL-LOOP DETECTORS. Ross Patterson Rutgers University