diff --git a/roles/docker/templates/compose-files/postfix.yml.j2 b/roles/docker/templates/compose-files/postfix.yml.j2
index 89f25ba..6a64111 100644
--- a/roles/docker/templates/compose-files/postfix.yml.j2
+++ b/roles/docker/templates/compose-files/postfix.yml.j2
@@ -6,7 +6,9 @@ services:
     image: boky/postfix:{{ services.postfix.version }}
     restart: always
     networks:
-      - postfix
+      postfix:
+        aliases:
+          - postfix
     volumes:
       - "./dkim:/etc/opendkim/keys"
     environment: