Hello Timo,
I'm sorry I haven't replied before, but I've been investigating as much as possible on this problem, and, for a moment, I thought I came up with something...
Thanks to Simone Caruso's hint, I've been doing some checks on LMTP-LDAP connections, since I would always get an LDAP error in the dovecot proxy's logfile.
Furthermore, I found out that the back end nodes didn't have resolv.conf aligned properly. So I blamed the errors to this misconfiguration, especially because as soon as I aligned resolv.conf, the three stuck mails I had in the queue this morning got delivered immediately!
Unfortunately, this is not the case.
I applied the three patches you provided to front end proxies and back end nodes.
I have a stuck mail that will not get delivered! I'm attaching the logs.
Thanks again for your help.
Regards,
CINZIA INNOCENZI Technical Consulting HP Enterprise Services Telephone +39 06.6542.5758 Email cinzia.innocenzi@hp.com Via Achille Campanile, 85 / Rome, Italy 00143
-----Original Message----- From: Timo Sirainen [mailto:tss@iki.fi] Sent: giovedì 30 giugno 2011 7.36 To: Innocenzi, Cinzia Cc: Del Coiro, Maria Giacinta; dovecot@dovecot.org Subject: Re: [Dovecot] Dovecot 2.0.13 problem with LMTP
Try to apply these patches to both proxy and backend and see what it logs then?
http://hg.dovecot.org/dovecot-2.0/raw-rev/1b1fc681a277 http://hg.dovecot.org/dovecot-2.0/raw-rev/36e7ded2ef0b http://hg.dovecot.org/dovecot-2.0/raw-rev/537d4b6d9a7a
On Tue, 2011-06-28 at 08:38 +0000, Innocenzi, Cinzia wrote:
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@hp.com
Via Achille Campanile, 85 / Rome, Italy 00143-----Original Message----- From: Timo Sirainen [mailto:tss@iki.fi] Sent: martedì 28 giugno 2011 2.04 To: Innocenzi, Cinzia Cc: dovecot@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)?