diff --git a/mail/docker-compose.yaml b/mail/docker-compose.yaml
index 5db0932..adc86bf 100644
--- a/mail/docker-compose.yaml
+++ b/mail/docker-compose.yaml
@@ -34,3 +34,8 @@ services:
       test: "ss --listening --tcp | grep -P 'LISTEN.+:smtp' || exit 1"
       timeout: 3s
       retries: 0
+
+networks:
+    default:
+      name: nginx-proxy
+      external: true