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