[Dovecot] Dovecot 2.0.13 problem with LMTP

[Innocenzi, Cinzia]

Hello Timo,

so far I've seen this happening when proxying a mail for one recipient; I've never seen this happening for multiple recipients.

The other thing I've noticed is that if I reload dovecot, the mail usually gets delivered. Once, it remained stuck in the queue, but after a few hours, when I checked postfix's queue again, it got delivered. 

Let me know if you need further information.

Regards,

CINZIA INNOCENZI
Technical Consulting
HP Enterprise Services
Telephone +39 06.6542.5758
Email cinzia.innocenzi at hp.com   
Via Achille Campanile, 85 / Rome, Italy  00143



-----Original Message-----
From: Timo Sirainen [mailto:tss at iki.fi] 
Sent: martedì 28 giugno 2011 2.04
To: Innocenzi, Cinzia
Cc: dovecot at dovecot.org; Del Coiro, Maria Giacinta
Subject: Re: [Dovecot] Dovecot 2.0.13 problem with LMTP

On Wed, 2011-06-22 at 10:31 +0000, Innocenzi, Cinzia wrote:
> Hello,
> 
> we have dovecot 2.0.13 installed in our RHEL5 servers. We use dovecot
> as a lmtp proxy on the front end mail relays and dovecot for back end
> lmtp/pop/imap. All our servers have RHEL5.6 64-bit and dovecot 2.0.13
> installed, and the back end has also an ext3 mbox file-system mounted.
> 
> Sometimes we have mails that get stuck on our postfix queue with the
> following error: Remote server not answering (timeout in DATA input)
> (in reply to end of DATA command)
..
> It doesn't happen for every single mail, it's random.

My guess is there's a bug somewhere in the LMTP proxy code. It's a bit
annoyingly complex code.. Do you see this happening when proxying only a
single mail (one RCPT TO per DATA, not multiple)?

And I would guess that when attempting to deliver the same mail again it
works fine (at least in a few tries)?