Problem configuring lmtp on cyrus backend

Michael Menge michael.menge at
Wed Mar 16 10:03:15 EDT 2011

Quoting Dave McMurtrie <dave64 at>:

> On 03/16/2011 09:12 AM, Michael Menge wrote:
>> Hi,
>> i have a problem configuring cyrus backend in a almost traditional
>> murder setup.
>> I have one master process which starts the forntend and backend services.
>> The forntend services use /etc/imapd_fe.conf as config file and listen
>> on the external network interface and the backend services listen to
>> the internal network interfaces and use /etc/imapd_be.conf
>> The lmtpdproxy delivers the mail to the backend using lmtp over tcp.
>> The backend lmtpd asks the mupdate server where the mailbox is,
>> which results in the "wrong" answer that the mailbox is remote.
>> The backend tries to proxies the mail to an other lmtpd
>> on the same backend. This results in an infinite loop.
>> I tried this with 2.4.6 and 2.3.16.
>> AFAIK the backend config must contain the mupdate_server
>> because create mailbox, rename mailbox and delete mailbox
>> information must be send to the mupdate master.
>> But if mupdate_server is configured lmtpd will ask
>> the mupdate_server where the mailbox is, which will always
>> result in an "remote mailbox" as answer
>> What do i need to change?
> If you're running 2.3.x on your frontends and 2.4.x on your backends,
> you need to upgrade your frontends.

Both frontend and backends where running 2.4.6 in the first try.
But after the fist problems i suspected a bug, as this setup was
working on a test system with an early 2.3.x some time ago.
So i tried this setup with 2.3.16. but it has the same problems.

M.Menge                                Tel.: (49) 7071/29-70316
Universität Tübingen                   Fax.: (49) 7071/29-5912
Zentrum für Datenverarbeitung          mail:  
michael.menge at
Wächterstraße 76
72074 Tübingen
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