I recently upgraded from 2.2.10 to 2.2.13, and also upgraded pigeonhole. Ever
since im seeing some empty emails appear in my inbox.
Return-Path: <cric...@stats2.xs4all.net>
Delivered-To: <cor>
Received: from imapdirector1.xs4all.net ([194.109.26.173])
by userimap9.xs4all.nl (Dovecot) with LMTP id CHu0MUDDjlOBdwAAwvsqNQ
for <cor>; Wed, 04 Jun 2014 08:57:04 +0200
Thats all this mail contains. This only happens using LMTP/Sieve, and with many
different senders/recipients. Debug log shows nothing out of the ordinary,
except that the mail seems to be corrupted by the time it hits sieve. It's very
hard to diagnose. Our path is kind of lengthy, and in theory it could happen
everywhere.
Mail first arrives on incoming MX server which is sendmail. From there it's
sent to a dovecot director using lmtp, which sends it to a server that does
final delivery with sieve. Im not sure where the email gets corrupted. Any
extra debugging I could turn on?
Two extra things to note. So far it seems to only happen to emails that would
have hit a matching sieve filter rule. I have asked a dozen people to verify
this, and all emails would have matched a filter if all was well. Instead, it
gets dropped into the inbox because pigeonhole seems to be working with the
corrupt file and cant match any rules anymore. And second, 99% of our email is
handled differently, from the sendmail server directly into a local mailer, and
that never causes issues. We're in the process of switching to lmtp.
Any insights?
cor
