Michael, LISTSERV does use the mailer from DOMAIN NAMES. LISTSERV applies a strict interpretation of the file, in that it expects the :nick to be a complete domain string. Your entry says: ------------------ Start of included file DOMAIN NAMES ----------------- :nick.BU.EDU :mailer.MAILER@BOSTONU BSMTP 3 :site.Boston University Local Area Network :gatemast.Gatemast@Bostonu ------------------ End of included file DOMAIN NAMES ----------------- LISTSERV interprets this as only applying to node BU.EDU, not to xx.BU.EDU. This is also the case with MAILER, I believe. You shoould correct the entry to start ":nick..BU.EDU", as do most others in DOMAIN NAMES. Ross Patterson Rutgers University