As 
https://doc.dovecot.org/configuration_manual/service_configuration/#client-limit
 says, 0 means to apply default_client_limit, which defaults to 100.

Aki

> On 16/08/2022 20:11 EEST fil...@digirati.com.br <fil...@digirati.com.br> 
> wrote:
> 
>  
> currently the client_limt is at zero, and I believe this is unlimited
> 
> service config {
>    chroot =
>    client_limit = 0
>    drop_priv_before_exec = no
>    executable = config
>    extra_groups =
>    group =
>    idle_kill = 1 mins
>    privileged_group =
>    process_limit = 0
>    process_min_avail = 16
>    protocol =
>    service_count = 100
>    type = config
>    unix_listener config {
>      group =
>      mode = 0600
>      user =
>    }
>    user =
>    vsz_limit = 2 G
> }
> 
> On 16/08/2022 18:06, Aki Tuomi wrote:
> > Can you try increasing client_limit for service config, to maybe, say, 
> > 1000? There should be no reason to have lots of multiple config processes, 
> > so it sounds more like the client limit is being reached.

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