Install GNU Mailman on Debian/Ubuntu

Install GNU Mailman and dependencies 

sudo apt-get install mailman postfix

Link mailman apache configuration 

sudo ln -s /etc/mailman/apache.conf /etc/apache2/conf-available/mailman-apache.conf

Edit mailman.conf to remove cgi-bin reference 

sudo vi /etc/apache2/conf-available/mailman-apache.conf

Edit mm_cfg.py to match removal of cgi-bin 

sudo vi /etc/mailman/mm_cfg.py

Enable new configuration and reload apache 

sudo a2enconf mailman-apache.conf
sudo a2enmod cgi
sudo service apache2 reload

Create a space to store list configuration files 

sudo mkdir /etc/mailman/lists

Setup environment to separate system aliases from list aliases 

sudo mv /etc/aliases /etc/aliases-system
sudo touch /etc/aliases
sudo touch /etc/mailman/lists/README

Build your first list. The mailman list is required for proper functioning of the system otherwise the Mailman Master Queue Runner service will fail to start. The .info file is purely for house-keeping purposes in large-scale implementations. 

sudo sh -e -c "newlist --quiet --automate mailman listowner@yoursite.tld insecurepassword | grep -A 12 ^# > /etc/mailman/lists/mailman.conf"
sudo sh -e -c 'echo "Ticket: \nDepartment: \nRequestor: \n" > /etc/mailman/lists/mailman.info'

Build /etc/aliases from /etc/aliases-system and /etc/mailman/lists/*.conf 

sudo sh -c "cat /etc/aliases-system /etc/mailman/lists/*.conf > /etc/aliases"
sudo newaliases

Start mailman 

sudo service mailman start

You should be able to visit the following URLs related to your site:

Notes