This how-to is based on my previous German how-to for Ubuntu 16.04 Server. Instead of using Spamassassin, Amavis, Pyzor and Razor as well es OpenDKIM, we’ll make use of Rspamd. Rspamd as a modern replacement will reduce the complexity of our setup and let us monitor its state via a web interface. As in earlier versions of my mailserver how-to, I’ll explain most important parts of the system as we install and configure them one after another. You will need basic Linux and command line knowledge to finish this guide. Going through this article will take probably about 45 minutes - depending on your speed and skills.