dovecot-lmtp crashing when setting lmtp_proxy=yes

[Camilo Sperberg]

Your solution did work perfectly, although I had to enable an inet-listener
because I had only a socket connection configured. In hindsight the problem
was pretty obvious but the segfault threw me off a bit.

Thanks for the answer!

Greetings,
Camilo Sperberg

On Fri, Jul 16, 2021 at 8:10 AM Aki Tuomi <aki.tuomi at open-xchange.com>
wrote:

>
> > On 15/07/2021 18:37 Camilo Sperberg <unreal4u at gmail.com> wrote:
> >
> >
> > Hi all:
> >
> > We are currently in the process of setting up dovecot proxy so that we
> can deploy multiple machines in order to keep growing.
> >
> > We are trying now to create an entry point, and from there send the
> traffic to either the same machine or another node.
> > For this, we are using a MySQL database with information about which
> server hosts which mailboxes, which turns out to be working great for
> sending out mail and general authentification. This was really simple to
> set up, kudos for that!
> >
> >
> > However, whenever I want to *receive* email, I just have to enable the
> lmtp_proxy setting which makes the lmtp process segfault.
> >
> > This happens everytime as I can reliable reproduce it + get a stack
> trace of it. The process will crash on every incoming email.
> >
> >
> > I have attached:
> > - Complete output of dovecot-sysreport
> > - A core dump of the crashed process
> >
> > Main information:
> > Using dovecot v2.3.14 (cee3cbc0d) on Ubuntu 18.04 LTS: Linux
> 5.4.0-1046-gcp x86_64 Ubuntu 18.04.5 LTS. Our MTA is postfix.
> >
> > Logs around the crashed process:
> > Jul 15 14:53:21 server postfix/postscreen[19402]: CONNECT from >
> >
> > Am I missing something in the conf? Did I encounter a bug? If you need
> more information, please let me know.
> >
> > Greetings,
> > Camilo Sperberg
> >
>
> Hi!
>
> Try returning port for the LMTP connection in your passdb query.
>
> Aki
>
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