Comment 8 for bug 1991564

I tested Bryce's PPA above (thank you), which of course got rid of the SSL error.

You can fix the stats-writer error by changing the mode for stats-reader and stats-writer in /etc/dovecot/conf.d/10-master.conf to 0666.

This is my working block:

service stats {
  unix_listener stats-reader {
    user = vmail
    group = vmail
    mode = 0666
  }

  unix_listener stats-writer {
    user = vmail
    group = vmail
    mode = 0666
  }
}

On restart, doveadm runs as expected.

As far as whether it's worthwhile patching Dovecot, for me this was a blocking error in Postfixadmin. In recent versions, using Dovecot 2.3.16, you get warnings that interrupt the setup process and, more critically, you can't log into the Postfixadmin panel. In searching for a fix for this, I saw quite a few people--both on the PFA repo and sites like Server Fault--who weren't able to resolve this without building Dovecot from source.

Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy