Issue with LMTP proxying and port number

[Steven Craig]

Thanks, its a weird one.

On 1/6/2019 8:00 AM, Stephan Bosch wrote:
>
> Op 06/01/2019 om 11:50 schreef Stephan Bosch:
>>
>> Op 31/12/2018 om 23:59 schreef Steven Craig:
>>> Hello there,
>>>
>>> Everything was working fine on Dovecot 2.2.10 (on CentOS 7), but 
>>> after updating to version 2.2.36, our director servers are not able 
>>> to proxy LMTP.
>>>
>>> We are sending mail from exim to the local Dovecot LMTP socket, 
>>> which then used to send it to our internal mail servers on port 24.
>>>
>>> Besides the update, nothing has changed in the config files. The 
>>> configuration has been working great for months … Then we had a 
>>> great idea of doing holiday maintenance.
>>>
>>> (Currently, we are working around this issue by having exim send 
>>> mail to the IP and port, instead of the socket.)
>>>
>>> Doing a tcpdump capture shows no TCP traffic either.  The logs seem 
>>> to say that it is trying to go to port 0, so my guess is that it’s 
>>> not getting the port directive from either static or sql — since the 
>>> docs state that if these settings aren't specified, it will always 
>>> use the same connection type for the proxy that it received the 
>>> connection on.
>>>
>>> Any thoughts?  I can share config if necessary.
>>
>> Yes, output from `dovecot -n` could be helpful.
>>
>> Also a literal dump of those errors in the log could help.
>
> Never mind, I can reproduce it here, even with master.
>
> We'll get back to you.
>
> Regards,
>
> Stephan.
>