This installation guide covers Postorius, the web user interface for GNU Mailman 3. To install GNU Mailman follow the instructions in the documentation.

Install Postorius

Postorius supports Python 3.6+ and Django 2.2+. This information could however be out-of-date at a future time. Please refer to the for the latest supported version of Django.

Latest release

If you just want to install the latest release of Postorius, install it from PyPi:

$ pip install postorius

Latest dev version

If you want to always be up to date with the latest development version, you should install Postorius using git:

$ git clone
$ cd postorius
$ pip install -e .


This note only pertains to development installs and should not be used when doing production installs.

When setting up or running your local dev environment, you may run into some errors. You may want to consider installing mailman modules from source as changes may not yet be published to PyPI. Example usage below:

$ pip install -U git+

Setup your django project

Since you have now installed the necessary packages to run Postorius, it’s time to setup your Django site.

You can find an example project in example_project in the root of postorius' git repository.

Change the database setting in example_project/ to your preferred database, if you want something other than SQlite.


Detailed information on how to use different database engines can be found in the Django documentation.

Third, prepare the database:

$ cd example_project
$ python migrate

This will create the postorius.db file (if you are using SQLite) and will setup all the necessary db tables.

To create a superuser which will act as an admin account for Postorius, run the following commands:

$ cd example_project
$ python createsuperuser

Running the development server

The quickest way to run Postorius is to just start the development server:

$ cd example_project
$ python runserver


You should use the development server only locally. While it’s possible to make your site publicly available using the dev server, you should never do that in a production environment.