rbl {
  rbls {
    fake {
      from = true;
      ipv4 = true;
      ipv6 = true;
      rbl = "fake.rbl";
      symbol = "FAKE_RBL_UNKNOWN";
      received = true;
      symbols_prefixes = {
        received = 'FAKE_RECEIVED_RBL',
        from = 'FAKE_RBL',
      }
      unknown = true;
      returncodes = {
        "CODE_2" = "127.0.0.2";
        "CODE_3" = "127.0.0.3";
      }
    }
    fake_whitelist {
      from = true;
      ipv4 = true;
      ipv6 = true;
      received = true;
      is_whitelist = true;
      rbl = "fake.wl";
      symbol = "FAKE_WL_RBL_UNKNOWN";
      unknown = true;
      returncodes = {
        "FAKE_WL_RBL_CODE_2" = "127.0.0.2";
        "FAKE_WL_RBL_CODE_3" = "127.0.0.3";
      }
    }
  }
}