OT: Invalid domain name during SMTP test

[Glenn Steen]

On 12/09/06, René Berber <r.berber at computer.org> wrote:
> Billy A. Pumphrey wrote:
>
> >> -----Original Message-----
> >>
> >> Do you have split DNS?
> >>
> >> Nate
> >
> > If I understand what split DNS is, yes I do.  The DNS is configured to
> > resolve with the local Windows DNS server, then if the windows server
> > does not know the lookup, it will query the internet.
>
> No, split view DNS means you see a local IP address from your LAN and you see the Internet address from outside (for the name of your mail server).
>
> The above comment probably means that you can see different names too, but it makes no sense to me, something like server.domain.local from inside and just server.domain from outside... for the same IP address?

It means that Billy has an M$ AD DNS setup according to the (idiotic)
gospel according to M$. Nothing else. Also shows why this is such a
bad idea:-).
IIRC this was deamt up to "alleviate" the problems possibly due to a
split DNS. Sigh. There is some KB article that I'm too lazy to find,
with all the (laughable) details...

> Anyway, the original problem is probably in /etc/hosts or hostname, not in DNS.  You have to see where your mail server gets its name from, with sendmail the commands:
>
> echo '$=R' | sendmail -bt -d0.10
>
> will show you the name (Canonical name) and domain info among other things.

It is a very long time since I could call myself anything even close
to a sendmail guru (editing the cf file directly was the norm
then:-)... But even back then you could certainly lie as necessary by
just setting the darned thing directly. I'd imagine this to be an m4
macro these days (that probably defaults to hostname as perceived by
the resolver/hostname command:-).

-- 
-- Glenn
email: glenn < dot > steen < at > gmail < dot > com
work: glenn < dot > steen < at > ap1 < dot > se