Keld J?rn Simonsen:
> > OK, here goes:
> >
> > 1) The server replies with "good news". Postfix replies with good news.
> >
> > 2) The server replies with "bad news". Postfix replies with 5xx.
> >
> > 3) No server reply. Postfix replies with 4xx.
> >
> > Is this finally clear?
>
> Yes, thanks. But it seems that my postfix reacts differently on
> a NXDOMAIN and SVRFAIL, although they both should lead to 5xx error codes.
> That is why I am so thick to not understand.
>
> >From my previous post:
>
> Jul 14 00:11:58 rap postfix/smtpd[1054]: NOQUEUE: reject: RCPT from
> rap.rap.dk[127.0.0.1]: 450 4.1.8 <jets...@server30.reverya.com>: Sender
> address +rejected: Domain not found; from=<jets...@server30.reverya.com>
> to=<k...@localhost> proto=ESMTP helo=<rap.rap.dk> Jul 14 00:11:58 rap
> postfix/smtpd[1054]: +> rap.rap.dk[127.0.0.1]: 450 4.1.8
> <jets...@server30.reverya.com>: Sender address rejected: Domain not found
>
> here there is a 450 response to a name server error. You said above:
This would be an excellent time to RTFM for reject_unknown_sender_domain,
which will refer you to unknown_address_reject_code and
unknown_address_tempfail_action.
Wietse
