> I checked the DNS setup, and it looks OK to me (no lame delegation,
> zones are consistent etc). It is a little uncommon that the reverse
> zone contains a CNAME for a PTR record, but Exim has no trouble to find
> out the hostname, so that appears to work.
>
> I have no idea why looking up the host fails, though. Any ideas?
I investigated this further and the problem appears to exist with other
hosts, too, like some kind of temporary error is being ignored.
I extracted all host lookup failures first:
awk '/no IP address found for/{ print $9 }' mainlog
Looking them up, there are quite a few which actually resolve. Most of
them are caused by zones not being in sync, but a few resolve, all
servers agree on that and the zone serials are old. Like:
chello062178054035.19.11.vie.surfer.at
COX-70-183-41-10-static.coxinet.net
Does anybody else see this problem? At this point, I guess it is either
Exim or BIND.
Michael
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