The Admin Guide is included in the download, but can also be viewed online
See section §2 for the Installation instructions.
The source code is hosted on GitHub, at https://github.com/greysoft/mailismus
Generic all-platforms release, which works on any Java-capable platform (including Unix, Windows, MacOS).
Simply unpack it and run.
• mailismus-2.0.0.zip (ZIP format)
• mailismus-2.0.0.tar.gz (compressed Tar)