Enable email in matrix.

roles/docker/files/configs/matrix/homeserver.yaml.j2

@@ -820,23 +820,10 @@ password_config:
 # If your SMTP server requires authentication, the optional smtp_user &
 # smtp_pass variables should be used
 #
-#email:
+email:
-#   enable_notifs: false
+  smtp_host: "{{ smtp_host }}"
-#   smtp_host: "localhost"
+  smtp_port: {{ smtp_port }}
-#   smtp_port: 25
+  notif_from: "{{ services.matrix.domain }} <no-reply@{{ services.matrix.domain }}>"
-#   smtp_user: "exampleusername"
-#   smtp_pass: "examplepassword"
-#   require_transport_security: False
-#   notif_from: "Your Friendly %(app)s Home Server <noreply@example.com>"
-#   app_name: Matrix
-#   # if template_dir is unset, uses the example templates that are part of
-#   # the Synapse distribution.
-#   #template_dir: res/templates
-#   notif_template_html: notif_mail.html
-#   notif_template_text: notif_mail.txt
-#   notif_for_new_users: True
-#   riot_base_url: "http://localhost/riot"
-
 
 #password_providers:
 #    - module: "ldap_auth_provider.LdapAuthProvider"

roles/docker/tasks/services/matrix_element.yml

@@ -82,6 +82,7 @@
           networks:
             - matrix
             - external_services
+            - postfix
           volumes:
             - "{{ services.matrix.volume_folder }}/data:/data"
           environment:
@@ -113,5 +114,7 @@
         external_services:
           external:
             name: external_services
+        postfix:
+          external: true
         matrix:
           name: "matrix"

roles/docker/tasks/services/postfix.yml

@@ -23,6 +23,6 @@
       - "{{ services.postfix.volume_folder }}/dkim:/etc/opendkim/keys"
     env:
       # Get all services which have allowed_sender_domain defined
-      ALLOWED_SENDER_DOMAINS: "{{ services | dict2items | selectattr('value.allowed_sender_domain', 'true') | map(attribute='value.domain') | join(' ') }}"
+      ALLOWED_SENDER_DOMAINS: "{{ base_domain }} {{ services | dict2items | selectattr('value.allowed_sender_domain', 'true') | map(attribute='value.domain') | join(' ') }}"
       HOSTNAME: "{{ services.postfix.domain }}" # the name the smtp server will identify itself as
       DKIM_AUTOGENERATE: "true"