On 2013-11-07 8:53, Jan Phillip Greimann wrote:
This is dovecot 2.2.7, postfix 2.10.2, all addresses type virtual mailbox domain class, and dovecot/lmtp delivery.
I noticed a strange log-entry since the last day:
Nov 7 08:34:42 hetzner postfix/lmtp[3764]: 61CB01A3938: to=jg+introversion@larptreff.de, relay=mail.larptreff.de[private/dovecot-lmtp], delay=0.05, delays=0.01/0.01/0.02/0.01, dsn=4.4.2, status=undeliverable (lost connection with mail.larptreff.de[private/dovecot-lmtp] while sending MAIL FROM)
I noticed as well, that some of my addresses lead to unusual rejections never anticipated before:
postfix/lmtp[1234]: 3dFbVw2NVmz6SL: to=example@example.com, relay=mx1.example.com[private/dovecot-lmtp], delay=0.04, delays=0.03/0/0/0.01, dsn=4.4.2, status=undeliverable (lost connection with mx1.example.com[private/dovecot-lmtp] while sending MAIL FROM)
It seems this only happens on mails with "+"-Delimiter.
In my case regular addresses are rejected as well (see example).
What I really do not understand is that out of e.g. 50 different recipient addresses of one virtual mailbox domain only a few are rejected, the other pass as usual. This is not random, some addresses pass always, others fail reproducible.
In my opinion there is only one thing which could cause this problem: I updated my dovecot on 2013/11/04 from 2.2.6-1~auto+36 to 2.2.7-1~auto+2
I updated two days ago.
I will try to downgrade again, did someone have a clue?
I have no clue what leads to those random rejections of recipient addresses. After setting ...
| warn_if_reject reject_unverified_recipient
... those mails are accepted. But I do consider this a temporary workaround.
Regards, Michael