Gerben Wierda skrev den 2020-11-21 15:48:
I think I am using postfix defaults here.
WHen a client is rejected because of a mssing reverse hostname, I see:
this is a non default config
Nov 21 15:37:02 mail smtp/smtpd[2168]: NOQUEUE: reject: RCPT from
unknown[46.221.40.2]: 450 4.7.1 Client host rejected: cannot find your
reverse hostname, [46.221.40.2]; from=<a95901...@rna.nl>
to=<a95901...@rna.nl> proto=ESMTP helo=<[46.221.40.2]>
this ip is a dynamic ip where you should not accept mail from
http://multirbl.valli.org/lookup/46.221.40.2.html
And I was just wondering: why is that a 4xx message (temp failure) and
not a 5xx failure?
post the non default config would help
postconf -n
