diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..db02a5f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "smtp"]
+	path = smtp
+	url = git@github.com:abhin4v/docker-smtp.git
diff --git a/docker-compose.yml b/docker-compose.yml
index b08a4b5..8e083f7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -45,7 +45,8 @@ services:
       - ./nginx-log:/var/log/nginx
       - ./certs:/etc/nginx/certs:ro
   smtp:
-    image: namshi/smtp
+    build:
+      context: ./smtp
     environment:
       MAILNAME: space.abhinavsarkar.net
   pihole:
diff --git a/smtp b/smtp
new file mode 160000
index 0000000..49dbeb4
--- /dev/null
+++ b/smtp
@@ -0,0 +1 @@
+Subproject commit 49dbeb4b31d136a7f09f32230260d2586359b5c1