diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..32a04d1
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "vmail-stack"]
+	path = vmail-stack
+	url = git@git.stack-source.com:msb/vmail-stack.git
diff --git a/vmail-stack b/vmail-stack
new file mode 160000
index 0000000..6991369
--- /dev/null
+++ b/vmail-stack
@@ -0,0 +1 @@
+Subproject commit 699136907fc175aa2ca66504804b3cdd2cf180d9