Stefan Bauer:
> We just noticed, that senders got several "550 5.1.0 Address rejected"
> bounces even though postfix logs no permanent errors.
>
> Oct 11 17:19:13 kop01 postfix/lmtp[5711]: E759E301412: to=<adm...@domain.tld>,
> relay=127.0.0.1[127.0.0.1]:2003, delay=13, delays=0/0.01/13/0, dsn=4.0.0,
> status=undeliverable (host 127.0.0.1[127.0.0.1] refused to talk to me: 421
> internal error: OpenResolveAddrFolder failed)
>
> Isn't status=undeliverable a 5xx reject?
The '421' is what really matters here.
Wietse
