mailman @ Infomaniak Public Cloud

Intro

Mailman, the GNU Mailing List Manager is free software for managing electronic mail discussion and e-newsletter lists.is a mailing list

This is a guide to set it up using Infomaniak Public Cloud and Infomaniak Email Service.

On a classic install, you have to tweak the mail server at your domain to pipe emails to mailman. Here we use a method to have only one email account and fetchmail to deliver to mailman.

Installation

TODO guide for https (certbot)

Services

First we need openstack credentials that we obtain after project creation at Infomaniak

Then, an Email Service for a domain, and an email address

Here we will create an email address for mailman and a list "mylist":

mailman@yourdomain

and add the aliases here:

• postorius
• mylist
• mylist-bounces
• mylist-confirm
• mylist-join
• mylist-leave
• mylist-owner
• mylist-request
• mylist-subscribe
• mylist-unsubscribe

Note the email account password to use afterwards

Infrastructure

Let's use Terraform with the OpenStack Provider to create Vm, security group & all

❯ cd terraform

Init terraform to download provider plugins

❯ terraform init

Initializing the backend...
(...)
Terraform has been successfully initialized!

Source your openstack credentials and then:

❯ terraform apply

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:
(...)
Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

(...)

Apply complete! Resources: 15 added, 0 changed, 0 destroyed.

Outputs:

ipv4_address = "xxx.xxx.xxx.xxx"
ipv6_address = "[2001:1600:xx:xx::xxxx]"

There we go, machine set up, use one of the two IP addresses here in the inventory file

❯ cd ..

Setup

Let's configure everything with Ansible.

Create an inventory file called inventory using example

mailman ansible_host=xxx.xxx.xxx.xxx

[all:vars]
ansible_python_interpreter=/usr/bin/python3
ansible_user=debian
ansible_ssh_private_key_file=id_tf_keypair
fqdn=mailman.<yourdomain>
mail_host=mail.infomaniak.com
mail_account=mailman@<yourdomain>
mail_password=<email_password>
mailman_user=mailman
mailman_password==<interface_password>
mailman_domain=parano.ch
mailman_email=<your_email>

You need to replace <> elements by the real values.

• interface_password is used to connect to the web interface
• mailman_email is your own email address

Launch playbook to configure it all

❯ ansible-playbook playbook.yml -D

PLAY [install mailman] *****************************************************************************************************************************************************************************************************************
(...)

PLAY RECAP *****************************************************************************************************************************************************************************************************************************
mailman                    : ok=19   changed=17   unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Usage

Log in to the interface http://[2001:1600:x:x::xxx]/mailman3 with the mailman login and password you defined in the inventory, replacing with the ip of your instance

-> Create a domain -> Create a list "mylist"

In the list paremeters

• DMARC Mitigations, I recommend using "Replace from with list address"
• Alter Messages, I recommend using "Reply to the list" and "First strip reply to"

Done :)