Content Management System

Mailman3 or MM3 is devoloped by sadists! The most awaked software I've attempted to use! My Main Server hades is an AWS EC2 m3.mediam instance. It has been running exim for SMTP for years.

I installed mailman3 NOT milman3-full as the website is hosted on another server

Run
sudo -u list mailman info

The above should INCLUDE "Config file" output 
config file: /etc/mailman3/mailman.cfg

At the top of


/etc/exim/exim4.conf
add
## -_-_-_ MailMan
MM3_LMTP_PORT=8024
# Assuming a typical source installation in /usr/local, with
# links to the Mailman bin directory and so on from MM3_HOME.
MM3_HOME=/usr/local/var/mailman
MM3_UID=list
MM3_GID=list
# The path to the list receipt (used as the required file when
# matching list addresses)
MM3_LISTCHK=/var/lib/mailman3/lists/${local_part}.${domain}
/etc/exim/exim4.conf
add 
.include_if_exists /etc/exim4/conf.d/transports/10_mailman.conf
/etc/exim4/conf.d/transports/10_mailman.conf
add 
#_-_-_-_ MailMan Transport
mailman3_transport:
  driver = smtp
  protocol = lmtp
  allow_localhost
  hosts = localhost
  port = MM3_LMTP_PORT

Now restart exim
sudo service exim4 restart
Now we need to create a list
sudo -u list mailman create -nd list@lqresidents.uK