Christian H. Kuhn via Postfix-users:
> Dear Wietse,
>
> thank you for your answer.
>
> Am 28.05.2025 um 21:57 schrieb Wietse Venema via Postfix-users:
> > (There should be warnings logged that saywhich table lookup failed.
> > Does your system perhaps log error and non-error messages to different
> > files? That is not a good idea - it complicates trouble shooting.)
>
> I'm logging with syslog, mail facility. Debug level has it's own file,
> but it's empty. I cited from mail.info which contains log level info and
> higher.
>
> I added -v in master.cf, perhaps i'll get a closer hint.
>
> > - Next the Postfix SMTP daemon is supposed to find out if the domain
> > exists in DNS, but there are no table lookups involved here.
>
> If postfix has no access to DNS, would that not be a configuration
> error? The host in question has both an DNS and a reverse DNS entry, and
> they match.
It would not be a Postfix table lookup error.
> > My bet is that the above error goes away when you delete
> > smtpd_sender_restrictions.
> >
> > The error may then happen at a different point in time, while
> > processing smtpd_recipient_restrictions.
>
> But that's for debugging only? reject_unknown_sender_domain is there for
> reasons :-)
I want to confirm that your data and my analysis are correct.
If you prefer to contradict the doctor, then I can't help you.
Wietse
> > BTW you need to request a new Zen API key and delete the old one.
>
> Thank you for the hint, i'll do immediately.
>
> Kind regards,
> QNo
>
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