Dovecot behind Load Balancer

[Aki Tuomi]

> On 12/06/2019 20:02 Paolo Daniele via dovecot <dovecot at dovecot.org> wrote:
> 
> 
>  Hi,
>  i've a question for you.
>  I've two dovecot imap/pop server behind a zen load balancer.
>  Load balancing is made by lx4nat so the public ip address of my load balancer contact directly the dovecot servers.
>  Since few months i've a message from thunderbird that i've reached the imap limit login for ip.
>  I've triend to increase the max user ip parameter but sometimes i've the same problem.
>  It's a strange things that actually i'm able to mitigate by reduce the number of cached connections in Thunderbird but it's not normal.
>  What do you think about that?
>  Maybe there's some tuning that you can suggest.
>  Thank you,
>  Paolo
>

Have you ensured, by checking logs, that the connections are seen by dovecot to come from public IP addresses?

Also, thunderbird is known to open lots of concurrent connections.

Aki