roles/docker/files/mailman/mailman-extra.cfg

@@ -0,0 +1,10 @@
+[mta]
+incoming: mailman.mta.postfix.LMTP
+outgoing: mailman.mta.deliver.deliver
+# mailman-core hostname or IP from the Postfix server
+lmtp_host: localhost
+lmtp_port: 8024
+# Postfix server's hostname or IP from mailman-core
+smtp_host: smtp
+smtp_port: 25
+configuration: /etc/postfix-mailman.cfg

roles/docker/files/mailman/postfix.cf

@@ -6,5 +6,6 @@ owner_request_special = no
 virtual_mailbox_maps = regexp:/opt/mailman-core-data/postfix_lmtp \$virtual_alias_maps
 transport_maps = regexp:/opt/mailman-core-data/postfix_lmtp
 local_recipient_maps = regexp:/opt/mailman-core-data/postfix_lmtp
+relay_domains = regexp:/opt/mailman-core-data/postfix_domains
 always_add_missing_headers = yes
 local_header_rewrite_clients = permit_sasl_authenticated

roles/docker/tasks/services/mailu.yml

@@ -49,6 +49,12 @@
     dest: "{{ mailu.volume_folder }}/overrides/postfix.cf"
     mode: "0644"
 
+- name: "[Mailman] copy mailman config"
+  copy:
+    src: mailman/mailman-extra.cfg
+    dest: "{{ mailman.volume_folder }}/core/mailman-extra.cfg"
+    mode: "0644"
+
 - name: Start containers
   docker_compose:
     project_name: mail_server