Mailman in a MultiServer setup Ubuntu
So I Have been looking around and I just can't find the answer. I have a development multi server setup. However I never figured out one thing. And that is where the Mailman app gets installed.
This is my current configuration and I am putting the same structure online in the cloud.
Panel ISPconfig controlling server
Mail Email server
DB DB server
NS DNS server
So my question is this. Do I install mailman on the Panel (dedicated to control the ispconfig configuration) or the webserver, or the mail server? And what do I Need to do to install it where ever it goes? I use nginx as my web server.
Cheers! and thanks in advance.