diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index fed2ae70a..53f7e7b4e 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -43,3 +43,4 @@ services:
     container_name: mailserver
     ports:
       - 1080:80
+      - 25:25
diff --git a/docker-compose.test.yml b/docker-compose.test.yml
index 542a6c187..119cd20eb 100644
--- a/docker-compose.test.yml
+++ b/docker-compose.test.yml
@@ -40,3 +40,4 @@ services:
     image: djfarrelly/maildev
     ports:
       - 1080:80
+      - 25:25