Contact button in social left menu

Sorry to ask a silly question, but I can't make works the envelope icon.
I add the code to the social module:

<a class="gk-icon-email" href="index.php/contact"></a>

And I have Contact working in the main menu, but I don't know how to link the envelope with the contact.
Can you help me please?

http://comunicaciondeportiva.com/riccardotosetto/

Oh! I found the solution. What a silly!
I just add the link in template -> features -> E-Mail URL

Hi

Yes, that's a correct solution. Thank You for shearing I bet someone will be looking for same answer.