Re: Postfix DNS-problem
Hi
> I have trouble setting up Postfix (2.1.4-5) sending mail (receiving
> mail works fine) on an up to date sarge system.
>
> I have no local DNS-server running on that machine. DNS queries with
> dig or host works fine!
>
> My Problem: When I try to send mail with Postfix (i.e. to
> something@web.de), Postfix starts a correct DNS-query for the
> MX-Record of web.de. (I have done a tcpdump to verify that). Postfix
> also gets the correct answer (mx-ha01.web.de in this example).
>
> But than postfix didn't start a DNS-query for the A-Record of the
> MX-Host (as I can see in the output from tcpdump). Instead Postfix
> writes to syslog:
>
> Sep 28 17:34:56 host postfix/smtp[12455]: warning: no MX host for web.de has a valid A record
>
> Why can Postfix start an correct DNS-query for the MX-Record but isn't
> going to ask the DNS-server for the A-Record of the MX-Host?
I just had exactly the same problem, took about an hour to find the problem.
Just before the problem first appears i remounted /var with the noexec flag.
Remounting without this flag solved the problem. I hope this information
helped you.
cu Korbi
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