/**
  * Synchronize the status of the subscriber with Rapidmail
  * @param <type> $subscriber
  */
 public function syncSubscriber($subscriber)
 {
     // There is a new Subscriber
     if ($subscriber->getStatus() == Mage_Newsletter_Model_Subscriber::STATUS_NOT_ACTIVE) {
         // Create a new address in Rapidmail
         if (!Mage::helper('rapidmail')->checkRecipientExists($subscriber->getEmail())) {
             // Load for Customer or guest
             Mage::helper('rapidmail')->callRegisterMailForSubscriber($subscriber);
         } else {
             $subscriber->setRapidmailStatus(Narfstudios_Rapidmail_Model_Status::STATUS_NEW);
             $subscriber->save();
         }
     }
     // Already exists so just activate it
     if ($subscriber->getStatus() == Mage_Newsletter_Model_Subscriber::STATUS_SUBSCRIBED) {
         if (!Mage::helper('rapidmail')->checkRecipientExists($subscriber->getEmail())) {
             Mage::helper('rapidmail')->callRegisterMailForSubscriber($subscriber);
         }
         Mage::helper('rapidmail')->activateMail($subscriber->getEmail());
     }
     // If he should be deactivated delete the subscriber
     if ($subscriber->getStatus() == Mage_Newsletter_Model_Subscriber::STATUS_UNSUBSCRIBED) {
         if (Mage::helper('rapidmail')->checkRecipientExists($subscriber->getEmail())) {
             Mage::helper('rapidmail')->unregisterMail($subscriber->getEmail());
         } else {
             $subscriber->setRapidmailStatus(Narfstudios_Rapidmail_Model_Status::STATUS_DELETED);
             $subscriber->save();
         }
     }
 }