public function optinAction()
 {
     $email = $this->getRequest()->getParam('email');
     if (NewslettersSubscribers::optIn($email)) {
         $this->_helper->redirector('index', 'index', 'default', array('mex' => "You have subscribed our newsletter correctly."));
     } else {
         $this->_helper->redirector('index', 'index', 'default', array('mex' => "There was a problem during the email registration, please check your email address."));
     }
 }