Mailman I believe is no longer included in default setup/modules. However, you can still install it manually - which I did and it works as intended. Nice little interface via Virtualmin and I am happy as its simple and WORKS. The mail integration is also done for you, which helps people like me. However, it is version 2.1 the newer v3.x is a complete rewrite but does offer more features and (slightly) more modern interface. To install v3 seemed complex for a non geek as me.
Any plans to implement support for v3.x? Anyone using v3 outside virtualmin and is it worth it?