any sendmail gurus out there?

Okay, here's an interesting one... I'm not sure I can figure this one
out... i'm not even sure where to start.

I have a domain hosted in my dns, lets say it's domain.com. The MX record
for domain.com is mail(.domain.com.) That all works fine. Now, I want to
add a machine to domain.com, lets call it ln.domain.com. I want email
addressed to ln.domain.com to go to ln.domain.com unless ln.domain.com is
unavailable. Then I'd like it to go to mail, and be 'relayed'. (Someone
told me sendmail could do this... it will sit there, and sendmail will
continually try to contact ln.domain.com to deliver the mail.) Now, just
to confuse things, the ln.domain.com machine has a dynamic IP, which is
dealt with with something like dyn.ml.org (ya, I know it doesn't exist
anymore.)

So,:

ln.domain.com CNAME ln.dyn.ml.org.
        IN MX 10 ln
        IN MX 99 mail

But named complains about this:
named[12345]: ln.domain.com has CNAME and other data (invalid)

I haven't even tackled the sendmail part yet, except for looking up
'relay' in the bat book... it's not what the guy I was talking to was
talking about. Any hints or prods in the right direction?

thanks in advance

ttyl
srw

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Received on Thu May 27 19:11:32 1999