[Dovecot] status=undeliverable (lost connection with mail.larptreff.de[private/dovecot-lmtp] while sending MAIL FROM)

[Jan Phillip Greimann]

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Good morning dovecot-community,

I noticed a strange log-entry since the last day:

Nov  7 08:34:42 hetzner postfix/lmtp[3764]: 61CB01A3938:
to=<jg+introversion at 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)

Thankfully I've configured a cronjob for a daily pflogsumm-report, but
I don't understand this. It worked for months like a charm.

It seems this only happens on mails with "+"-Delimiter.


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

maillog:
http://pastebin.com/WDGfEjdp

doveconf -n:
http://pastebin.com/ay6dxiUf

I will try to downgrade again, did someone have a clue? Changelog from
2.2.7 didn't show changes on lmtp.

Best regards,
Jan
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