Return Greylisting settings

Example response

{
  "data": {
    "cpgreylist_config": {
      "child_timeout_secs": 5,
      "initial_block_time_mins": 10,
      "is_enabled": 1,
      "is_exim_enabled": 1,
      "max_child_procs": 5,
      "must_try_time_mins": 240,
      "purge_interval_mins": 60,
      "record_exp_time_mins": 4320,
      "spf_bypass": 1
    }
  },
  "metadata": {
    "command": "load_cpgreylist_config",
    "reason": "OK",
    "result": 1,
    "version": 1
  }
}