@Override
  public List<String> queryEmailContactors(String id) {
    ProductLine productline = queryProductline(id);
    List<String> mailReceivers = new ArrayList<String>();
    Receiver receiver = m_configManager.queryReceiverById(getId());
    if (receiver != null && !receiver.isEnable()) {
      return mailReceivers;
    } else {
      mailReceivers.addAll(buildDefaultMailReceivers(receiver));
      mailReceivers.addAll(split(productline.getEmail()));