public function sendSubscribeToNewsletterMessage(Actor $user)
    {
        $templateName = 'CoreBundle:Email:subscription.email.html.twig';

        $context = array(
            'user' => $user
        );

        $this->sendMessage(
                $templateName, 
                $context,  
                $this->twigGlobal->getParameter('admin_email'), 
                $user->getEmail()
                );
    }