diff --git a/roles/docker/tasks/services/nextcloud.yml b/roles/docker/tasks/services/nextcloud.yml
index 995b778..05ae410 100644
--- a/roles/docker/tasks/services/nextcloud.yml
+++ b/roles/docker/tasks/services/nextcloud.yml
@@ -49,6 +49,7 @@
           restart: "unless-stopped"
           networks:
             - "nextcloud"
+            - "postfix"
             - "external_services"
           volumes:
             - "{{ nextcloud.volume_folder }}/app:/var/www/html"