https://github.com/PowerDNS/weakforced cn be used for this.
-------- Original message --------
From: Marc Perkel <marc@perkel.com>
Date: 21/05/2018 19:09 (GMT+02:00)
To: dovecot@dovecot.org
Subject: Dovecot blacklist?
Just wondering if there is an easy way to have dovecot do a blacklist