Hi!

You can try auth_policy_server such as weakforced. See https://github.com/PowerDNS/weakforced https://github.com/PowerDNS/weakforced and <https://doc.dovecot.org/configuration_manual/authentication/auth_policy/#au thentication-auth-policy> https://doc.dovecot.org/configuration_manual/authentication/auth_policy/#aut hentication-auth-policy

Aki

And this Weakforced, i dont found for Debian Booster, so I have try to install but this need other meny requirements pakage,

so please this are also possible as package for Debian?

here any running with this this setup? I don't found any example on the net... or you using fail2ban?

Mauri