public function is_email_banned($email)
 {
     //return true;
     $banned_email_formats = $this->get_setting('banned_email');
     $banned = false;
     if (is_array($banned_email_formats)) {
         foreach ($banned_email_formats as $banned_email_format) {
             if (RM_Utilities::is_banned_email($email, $banned_email_format)) {
                 $banned = true;
                 break;
             }
         }
     }
     return $banned;
 }