How to get a message when a comment is posted?

Hello,

we just bought Komenko for our website running under Joomla 2.5 and using K2 version 2.6.7.
Integration was perfect in our multilanguage site.

We have activated the control of the comments. They are not published until validation.
Our question: how to display a message saying that the post has been sent to the admin for a validation?

Thanks for your reply