I have just gotten an error message from my LISTSERV stating that someone tried to sign on with an unknown domain. The information to the right of the @ are all numbers (i.e. 192.245.137.1). The host postmaster doesn't recognize this and neither do I. I deleted the user since it will spawn countless error messgaes. Has anyone else run across this sort of thing before? Anita Cohen-Williams; Reference Services; Hayden Library Arizona State University, Tempe, AZ 85287-1006 PHONE: (602) 965-4579 FAX: (602) 965-9169 INTERNET: [log in to unmask] Owner: HISTARCH, SPANBORD