Please note, Plesk has supported the version of Mailman provided by OS vendor by default.
The Mailman 3 is shipped by default on Ubuntu 18 and Debian 10.
Please keep voting if this request is still actual for you.
I dont know wy this is a fraud attempt to ask for mailman3 this is what he did, nothing more! I am maintainer of a mailman 2 instance and its difficult to implement and maintain the userlists and parse mailman databases. When i tried to set up dkim and dmarc i struggled with google hotmail etc. so i think this suggestion is quite good and dont needs any further explainaition by the person who initiated it. Just look at the number of votes and read the comments youll find good reasons . Thx in advance !
spf dmarc dkim mailman 3 is the way to gomorn Ori supported this idea ·
mailman3 support in plesk mailman 2 is to old regarding the new antispamm mechanisms like spf dkim dmarc etc