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= How to Install Mailman 3 on a Debian 10 Server. =

This document is a how to install the Mailman 3 server on a Debian 10 server. The server environment will include Debian 10, NGINX, Let's Encrypt, Postfix, and PosgresDB.

== Prepare Server Environment ==

1. Create a VPS running Debian 10. I recommend something from Digital Ocean or Linode. The server should be a minimum of 1 CPU and 2 Gigabyte of Memory. 25-50 Gb of storage should be sufficient.

2. Log into the server as root.

{{{
$ ssh root@your_server_ip
}}}

3. Create a New User: mailman

{{{
# adduser mailman
}}}

You will be asked some questions about this new user when running the above command. Please make sure you use a strong password for mailman as it will be typically known that any server running Mailman 3 will have a mailman user setup on it.

4. Let's go ahead and grant the 'mailman' user SUDO privileges while logged in as root:

{{{
# usermod -aG sudo mailman
}}}

5. I recommend setting up a basic firewall to tighten up security on this Mailman 3 server. UFW is one that can be installed on a Debian 10 server:

{{{
# apt update
# apt install ufw
}}}

Once UFW is installed, you need to make sure you allow the various applications that Mailman 3 will be using through UFW. Some of these applications are the following: OpenSSH, Nginx Full, and Postfix.

So here is an example of what to do immediately after you install UFW:

{{{
# ufw app list
}}}

{{{
Output
Available applications:
 . . .
 OpenSSH
 . . .
}}}

This tells us what available applications we can configure UFW to allow. So let's add OpenSSH to UFW:

{{{
# ufw allow OpenSSH
}}}

Now we can enable UFW:

{{{
# ufw enable
}}}

You can see what is allowed through the UFW firewall by running the following command:


{{{
# ufw status
}}}


{{{
Output
Status: active

To Action From
-- ------ ----
OpenSSH ALLOW Anywhere
OpenSSH (v6) ALLOW Anywhere (v6)
}}}

MailmanWiki: DOC/Howto_Install_Mailman3_On_Debian10 (last edited 2023-11-24 16:09:02 by msapiro)