[Dovecot] LMTP : Can't handle mixed proxy/non-proxy destinations

[Timo Sirainen]

On 27.1.2012, at 12.59, Alexis Lelion wrote:

> Jan 25 09:05:12 mail01 postfix/lmtp[23934]: A92709300DB: to=<
> user_on_mail02 at 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 at 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.