Hi Timo, I'm writing to alert you that even in version 2.1. we have the error: "Can't handle mixed proxy/non-proxy destinations" when we write to two users: one existent and one not.

The error occurs randomly.

I configure LDAP query in the file : dovecot-ldap.conf in this way:

pass_attrs = mail=user,userPassword=password,=proxy=y,mailHost=host, =proxy_timeout=600

specifying "=proxy=y" in order to proxy every mail.

As workaround, can I configure a static "host" for non-existing users?

This is my dovecot -n

2.1.rc5: /usr/local/etc/dovecot/dovecot.conf

OS: Linux 2.6.18-194.el5 x86_64 Red Hat Enterprise Linux Server release 5.5

(Tikanga) auth_mechanisms = plain login base_dir = /usr/local/var/run/dovecot/ disable_plaintext_auth = no listen = 127.0.0.1 lmtp_proxy = yes mail_gid = mailusers mail_location = maildir:/mnt/mbox1/mailusers/%n/Maildir mail_uid = mailusers passdb { args = /usr/local/etc/dovecot/dovecot-ldap.conf driver = ldap } plugin { quota = maildir:User Quota } protocols = lmtp service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } service_count = 0 vsz_limit = 256 M } service lmtp { inet_listener lmtp { port = 24 } } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 ssl = yes } } ssl = no syslog_facility = local5 userdb { args = /usr/local/etc/dovecot/dovecot-ldap.conf driver = ldap } protocol imap { mail_plugins = quota imap_quota } protocol lmtp { postmaster_address = info@amm2.miur.it }

Regards Cinzia

----Messaggio originale---- Da: tss@iki.fi Data: 28-gen-2012 18.32 A: "Alexis Lelion"<alexis.lelion@gmail.com> Cc: "Dovecot Mailing List"<dovecot@dovecot.org> Ogg: Re: [Dovecot] LMTP : Can't handle mixed proxy/non-proxy destinations

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.