docs: Adding reference to ndnSIM mailing list
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 22a788e..c2be159 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -3,6 +3,9 @@
Welcome to ndnSIM NS-3 based NDN simulator
==========================================
+We invite you to `join our mailing list <http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim>`_ to see and participate in discussions about ndnSIM implementation and simulations in general (`mailing list archives <http://www.lists.cs.ucla.edu/pipermail/ndnsim/>`_).
+
+
Contents:
.. toctree::