Bug#271564: 271564: Fwd: Mail delivery failed: returning message to sender

[Marc Haber]

On Wed, Sep 15, 2004 at 02:58:39AM -0700, Mike Mestnik wrote:
> > > Here is what I get from DNS...
> > > train:~# host -t MX filbert.is-a-geek.org
> > > Host filbert.is-a-geek.org not found: 3(NXDOMAIN)
> > > train:~# host filbert.is-a-geek.org
> > > filbert.is-a-geek.org has address 10.0.0.20

If there is an A record, you shouldn't get NXDOMAIN when querying for
a non-existing MX record.

See:
[25/523]mh@q:~$ host -t mx brokenmx-b.zugschlus.de
Host brokenmx-b.zugschlus.de not found: 3(NXDOMAIN)
[26/524]mh@q:~$ host -t mx brokenmx-a.zugschlus.de
[27/525]mh@q:~$ host -t a brokenmx-b.zugschlus.de
Host brokenmx-b.zugschlus.de not found: 3(NXDOMAIN)
[28/526]mh@q:~$ host -t a brokenmx-a.zugschlus.de
brokenmx-a.zugschlus.de has address 192.168.157.7
[29/527]mh@q:~$

This is public data, zone transfer is allowed. Feel free to try it
with my zugschlus.de zone yourself.

Greetings
Marc

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