On Sunday, July 12, 2009 at 12:07 CEST,
Keld Jørn Simonsen <k...@dkuug.dk> wrote:
> On Sun, Jul 12, 2009 at 11:55:36AM +0200, Ole Tange wrote:
>
> > Notice how you get a 4xx error code. It may simply be your
> > nameserver did not get an answer quickly enough.
Indeed, but 450 is on the other hand the default response code
(unknown_client_reject_code).
> you mean by debugging via tcpdump or the like?
No, that's not necessary.
> > If you see no reverse lookups succeeding at all, then it may be your
> > resolv.conf that does something weird.
>
> The host command was done on the same machine. and responses seem fast
> enough.
Sure, now that the answer is cached somewhere.
> Anyway asy70.asy179.tellcom.com.tr is a NXdomain. So maybe
> postfix tries to look up the name it got from the PTR.
reject_unknown_reverse_client_hostname only checks that the
PTR lookups succeeds, it doesn't care about the lookup result
like reject_unknown_client_hostname does.
--
Magnus Bäck
mag...@dsek.lth.se
