public function MailRemoveMailServers($server_id)
 {
     // $server_id : IDType (only one)
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args["server_id"] = $server_id;
     $this->encodeString($reg_args);
     $results = parent::MailRemoveMailServers($reg_args);
     $this->methodClose();
     return $this->decodeString($results);
 }