But what was postfix reporting to the Appliance that tried to deliver to postfix? The 421 is what postfix got from the groupware. Not what it was reporting to the deliverer.
Our setup is appliance -> Postfix -> Groupware. The appliance bounced several mails with a 550 5.1.0 Address rejected. Am Do., 11. Okt. 2018 um 22:12 Uhr schrieb Wietse Venema < wie...@porcupine.org>: > 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 >
