On these COVID-19 days I have plenty of time and decided to bring back control of my emails.
I configured an email server using this wonderful docker image https://github.com/tomav/docker-mailserver
and fixed its configuration via http://mail-tester.com/
I have some ban from outlook.com which I am trying to manage, the rest is working fine. What do you think? Is still possible to retain control of email servers in 2020?