protected function subscribe()
{
$rmb = new Custom_Newsletter_Resubscription_Message_Builder();
$nsm = new Newsletter_Subscription_Manager();
$nsm->setResubscriptionMessageBuilder($rmb);
$email = $this->getFirstElementValueNonDefault('email');
$this->_subscription_result = $nsm->subscribe(NULL, $email);
$this->_status = $this->_subscription_result === Newsletter_Subscription_Manager::SUBSCRIBED ? self::SUCCESS : self::FAILURE;
}