public function check()
 {
     $checkFailed = parent::check();
     if ($checkFailed != '') {
         return $checkFailed;
     }
     if ($this->subscriber_found && $this->subscriber_active) {
         // ups, schon in der liste drin
         $checkFailed = $this->getCheckFailed();
     }
     return $checkFailed;
 }
 public function check()
 {
     $checkFailed = parent::check();
     if ($checkFailed != '') {
         return $checkFailed;
     }
     if (!$this->subscriber_found || !$this->subscriber_active) {
         // nicht im System oder inaktiv
         $checkFailed = $this->getCheckFailed();
     }
     return $checkFailed;
 }