Welcome! In an earlier post, I had mentioned that the university was in the midst of finding a new listserver software and that we had landed on Mailman. This article outlines our setup, taken mainly from the documentation but boiled down to the essentials for me and probably most people.

You could probably install mailman from the apt repos and be just fine, but I chose to do it from source so that I got a deeper understanding of it and to customize certain aspects.