Setup mailman3 server

We want to migrate to mailman3 as mailman2 is basically unmaintained and requires Python 2 which is EOL.

Because the mailman and mailman3 packages conflict and we don't want to perform a big bang migration, mailman3 must be deployed on a separate server. mailman-web (mailman3's web interface) hasn't been packaged yet, so for now we are using my homebrewed PKGBUILD.

[1] https://gist.github.com/klausenbusk/5982063f95c503754a51ed2fefb8915e

Ref #59 (closed)

---

Migrated lists:

• arch-announce
• arch-devops-private
• arch-events
• arch-wiki-admins

roles/mailman/tasks/main.yml

@@ -22,7 +22,10 @@
     - milter_header_checks
 
 - name: open firewall holes for postfix
-  ansible.posix.firewalld: service=smtp permanent=true state=enabled immediate=yes
+  ansible.posix.firewalld: service=smtp zone={{ item }} permanent=true state=enabled immediate=yes
+  loop:
+    -
+    - wireguard
   when: configure_firewall
   tags:
     - firewall