I’m not sure I fully understand the question. However, I have installed MaaB purely for testing. But I can honestly say it is on the face of it a starting point for anyone who wants a mail server. But to sugest you cant install anything else is just plain wrong. MiaB is setup on a clean install of ubuntu 14.4 server which already has many software packages installed. I understand that you don’t support anything else but MiaB. I get that. Maybe to clear things up you should be more open about what MiaB actually does during an update because looking around this forum update have broken several systems. And that’s why I said to say I should not install any other software and let MiaB handle everything would be a little silly for a production server