matrix.archlinux.org: Support sending emails again

playbooks/matrix.archlinux.org.yml

@@ -18,6 +18,8 @@
       postgres_work_mem: 64MB
       postgres_maintenance_work_mem: 1GB
       postgres_effective_cache_size: 3GB
+    - role: postfix
+      postfix_relayhost: "orion.archlinux.org"
     - { role: matrix, tags: ['matrix'] }
     - { role: zabbix-agent, tags: ["zabbix"] }
     - { role: fail2ban, tags: ["fail2ban"] }

roles/matrix/templates/homeserver.yaml.j2

@@ -1787,11 +1787,11 @@ password_config:
 email:
   # The hostname of the outgoing SMTP server to use. Defaults to 'localhost'.
   #
-  #smtp_host: mail.server
+  smtp_host: localhost
 
   # The port on the mail server for outgoing SMTP. Defaults to 25.
   #
-  #smtp_port: 587
+  smtp_port: 10027
 
   # Username/password for authentication to the SMTP server. By default, no
   # authentication is attempted.
@@ -1816,7 +1816,7 @@ email:
   # Note that the placeholder must be written '%(app)s', including the
   # trailing 's'.
   #
-  #notif_from: "Your Friendly %(app)s homeserver <noreply@example.com>"
+  notif_from: "Arch Linux %(app)s server <noreply@archlinux.org>"
 
   # app_name defines the default value for '%(app)s' in notif_from. It
   # defaults to 'Matrix'.
@@ -1826,7 +1826,7 @@ email:
   # Uncomment the following to enable sending emails for messages that the user
   # has missed. Disabled by default.
   #
-  #enable_notifs: true
+  enable_notifs: true
 
   # Uncomment the following to disable automatic subscription to email
   # notifications for new users. Enabled by default.