On Fri, 16 Jul 1999 13:25:58 EDT, Stanley Horwitz <[log in to unmask]> said: > Nathan, we wonder if we can pass environment variables through Listserv > to our mail transport agent. This would solve the problem, I think. Except it almost never works that way. Listserv is almost certainly handing the mail across a TCP/IP socket on port 25, and the only information you can pass through there is the usual SMTP dialogs. Nathan is correct, CNAMEs cause problems. You can either put in an A record instead, or try to convince all the Sendmail sites out there to rebuild their sendmail.cf's with FEATURE(nocanonify). Given the success I have in getting my *own* users to install a recent enough Sendmail to include anti-spamming features, when it's in THEIR best interests, I doubt you'll get very far in getting the rest of the world to change their configurations to fix your problem. A technical note here: 'FEATURE(nocanonify)' has a rather nasty side effect in some environments - if you have 2 hosts 'a.sub.dom.edu' and 'b.sub.dom.edu', if you have nocanonify, you can't mail from host a to 'user@b', you have to give the full hostname. This tends to piss off users in departmental networks severely. ;) -- Valdis Kletnieks Computer Systems Senior Engineer Virginia Tech