On Tue, Dec 06, 2022 at 12:58:40PM +0100, Ralf Hildebrandt wrote:
> * Wietse Venema <[email protected]>:
>
> > Look in $queue_directory/etc/resolv.conf or /etc/resolv.conf.
>
> nameserver 127.0.0.1
> search DOMAINS
>
In addition to that error, your real mistake is enabling "native" in
smtp_host_lookup.
DO NOT DO THAT (unless running in an environment that is disconnected
from the public Internet). Postfix does not use RES_DNSRCH or
RES_DEFNAMES, but native lookp via nsswitch.conf does.
MX hostnames that came in via DNS SHOULD NOT be subject to random
tampering via native lookup.
--
Viktor.
