diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5fe5a05
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "modules/postfix"]
+	path = modules/postfix
+	url = gogs@lattuga.net:opuppet/module-postfix.git
diff --git a/modules/postfix b/modules/postfix
new file mode 160000
index 0000000..0fb9e26
--- /dev/null
+++ b/modules/postfix
@@ -0,0 +1 @@
+Subproject commit 0fb9e260271370ca43229ca0e85f0b54d2eabe1e