[Dovecot] LMTP : Can't handle mixed proxy/non-proxy destinations
Hello,
In my current setup, I uses two mailservers to handle the users connections, and my emails are stored on a distant server using NFS (maildir architecture) Dovecot is both my IMAP server and the delivery agent (LMTP via postfix) To avoid indexing issues related to NFS, proxying is enabled both on IMAP and LMTP. But when a mail is sent to users that are shared between the servers, I got the subject mentionned error in the logs :
Jan 25 09:05:12 mail01 postfix/lmtp[23934]: A92709300DB: to=< user_on_mail02@domain.com>, relay=mail01.domain.com[private/dovecot-lmtp], delay=0.07, delays=0.01/0/0/0.06, dsn=4.3.0, status=deferred (host mail01.domain.com[private/dovecot-lmtp] said: 451 4.3.0 < user_on_mail02@domain.com> Can't handle mixed proxy/non-proxy destinations (in reply to RCPT TO command))
From what I saw, the mail is then put in the queue, and wait until the next time Postifx will browse the queue. The mail will then be correctly delivered on "mail02". However, the "queue_run_delay" postfix parameter is set to 900, which means that the mail will be delivered with a lag of 15 minutes.
I was wondering if there was another way of handling this, for example by triggering an immediate queue lookup from postfix or forwarding a copy of the mail to the other server. Note that the postfix "queue_run_delay" was increased to 15min on purpose, so I cannot change that.
I'm using dovecot 2.0.15 on Debian Squeeze, kernel 2.6.32-5-amd64.
Thanks,
Alexis
On 27.1.2012, at 12.59, Alexis Lelion wrote:
Jan 25 09:05:12 mail01 postfix/lmtp[23934]: A92709300DB: to=< user_on_mail02@domain.com>, relay=mail01.domain.com[private/dovecot-lmtp], delay=0.07, delays=0.01/0/0/0.06, dsn=4.3.0, status=deferred (host mail01.domain.com[private/dovecot-lmtp] said: 451 4.3.0 < user_on_mail02@domain.com> Can't handle mixed proxy/non-proxy destinations (in reply to RCPT TO command))
I was wondering if there was another way of handling this, for example by triggering an immediate queue lookup from postfix or forwarding a copy of the mail to the other server. Note that the postfix "queue_run_delay" was increased to 15min on purpose, so I cannot change that.
It would be possible to change the code to support mixed destinations, but it's probably not a simple change and I have other things to do..
Maybe you could work around it so that LMTP always proxies the mails, to localhost as well, but to a different port which doesn't do proxying at all.
On 27.1.2012, at 12.59, Alexis Lelion wrote:
Jan 25 09:05:12 mail01 postfix/lmtp[23934]: A92709300DB: to=< user_on_mail02@domain.com>, relay=mail01.domain.com[private/dovecot-lmtp], delay=0.07, delays=0.01/0/0/0.06, dsn=4.3.0, status=deferred (host mail01.domain.com[private/dovecot-lmtp] said: 451 4.3.0 < user_on_mail02@domain.com> Can't handle mixed proxy/non-proxy destinations (in reply to RCPT TO command))
I was wondering if there was another way of handling this, for example by triggering an immediate queue lookup from postfix or forwarding a copy of the mail to the other server. Note that the postfix "queue_run_delay" was increased to 15min on purpose, so I cannot change that.
It would be possible to change the code to support mixed destinations, but it's probably not a simple change and I have other things to do.. Yes I understand, this is a quite specific request, and not that impacting actually. But it would be cool if you could keep this request somewhere in your queue :-)
Maybe you could work around it so that LMTP always proxies the mails, to localhost as well, but to a different port which doesn't do proxying at all. Actually this was my first try, but I had proxying loops because unlike for IMAP, the LMTP server doesn't seem to support 'proxy_maybe'
On 1/28/12, Timo Sirainen tss@iki.fi wrote: option yet, does it?
On 30.1.2012, at 11.24, Alexis Lelion wrote:
Maybe you could work around it so that LMTP always proxies the mails, to localhost as well, but to a different port which doesn't do proxying at all. Actually this was my first try, but I had proxying loops because unlike for IMAP, the LMTP server doesn't seem to support 'proxy_maybe' option yet, does it?
Dovecot v2.1 supports it.
participants (2)
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Alexis Lelion
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Timo Sirainen