This might be of general interest, so I'm posting here instead of sending e-mail back to Hong Zhang. LISTSERV uses the file DOMAIN NAMES to decide what Bitnet/Internet gateway to use for each recipient of a mailing list posting. Well, for completeness sake, the info in DOMAIN NAMES may be overridden by a local exit routine too, but if all your mail is going to an INTERBIT gateway then I don't thin that's happening. Anyway, mail going to [log in to unmask] is routed to whatever gateway claims responsibility for domain name "xyz.edu" or to a default gateway if no match is found. So the answer is "change (or override) the copy of DOMAIN NAMES that your LISTSERV uses" if you need LISTSERV to use the local SMTP server. Having said that, let me state that I've always been of the opinion that if a site registers an entry in DOMAIN NAMES, then it should be honored. That is, since someone at ALBANY.EDU (the first .EDU entry listed in DOMAIN NAMES) went to the trouble of registering their gateway, I won't override it. So, I'd suggest only overriding the entries that route traffic to INTERBIT. That way, your local SMTP will handle all Internet mail for domains not explicitly listed in DOMAIN NAMES. -jj