diff --git a/node_modules/c9/has-internal-domain.js b/node_modules/c9/has-internal-domain.js
new file mode 100644
index 00000000..cfcd29c3
--- /dev/null
+++ b/node_modules/c9/has-internal-domain.js
@@ -0,0 +1,15 @@
+var _ = require("lodash");
+
+
+var internalDomain = ['c9.io', 'clou9beta.com'];
+
+function hasInternalDomain(email) {
+    if (!email) return false;
+    
+    var emailElements = email.split("@");
+    var emailDomain = emailElements[emailElements.length - 1];
+
+    return _.contains(internalDomain, emailDomain);
+}
+    
+module.exports = hasInternalDomain;
\ No newline at end of file