final String hostAndPort = fessConfig.getMailSmtpServerMainHostAndPort();
        final List<String> hostPortList = DfStringUtil.splitListTrimmed(hostAndPort, ":");
        motorbike.registerConnectionInfo(hostPortList.get(0), Integer.parseInt(hostPortList.get(1)));
        motorbike.registerReturnPath(fessConfig.getMailReturnPath());
        parkingLot.registerMotorbikeAsMain(motorbike);
        return parkingLot;
    }