diff --git a/roles/docker/tasks/services/mailu.yml b/roles/docker/tasks/services/mailu.yml
index c70849d..0e2b4ab 100644
--- a/roles/docker/tasks/services/mailu.yml
+++ b/roles/docker/tasks/services/mailu.yml
@@ -57,6 +57,9 @@
           volumes:
             - "{{ mailu.volume_folder }}/data/psql_db:/data"
             - "{{ mailu.volume_folder }}/data/psql_backup:/backup"
+          networks:
+            - default
+            - external_services
 
         front:
           image: mailu/nginx:{{ mailu.version }}