Good, "simple" question; complex/hard answer. Yes, no, maybe. I'm not quiet ready to create another e-mail on the complexities and dis-synchronization of the domain name system. Suffice it to say though that when users move to another e-mail system (or host) that their userids don't necessarily stay the same. It sometimes helps to check users' previous posts to your list (archives) and scan for .signature block that give clues. Sometimes the NODMGT-L archives have references to Bitnet-to-Internet addresses. A note to POSTMASTER or ROOT or SYSTEM at the host can help. Using DiG or NSLOOKUP against the SOA record in the DNS. FINALLY, using the InterNIC WHOIS db for a technical contact for the domain. Been there, done that (the above). -- co-owner: INFOSYS, TQM-L, CPARK-L, ERAPPA-L, JANITORS, LDBASE-L, et -L URL:mailto:[log in to unmask] "BEEP if you luv LDBASE"