curl --request GET \
  --url https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/dns-check \
  --header 'Authorization: <api-key>'

{
  "status": "<string>",
  "data": {
    "mailServer": {
      "dns_setup": {
        "dkim": {
          "dkim_error": "<string>",
          "dkim_record": "<string>",
          "dkim_record_name": "<string>",
          "dkim_status": "<string>"
        },
        "mx_record": {
          "mx_error": "<string>",
          "mx_status": "<string>",
          "mx_record_value": "<string>"
        },
        "return_path": {
          "return_path_domain": "<string>",
          "return_path_error": "<string>",
          "return_path_status": "<string>",
          "return_path_value": "<string>"
        },
        "spf": {
          "spf_error": "<string>",
          "spf_record": "<string>",
          "spf_status": "<string>"
        }
      },
      "user": "<string>",
      "domain": "<string>",
      "recordsStatus": "<string>",
      "mode": "<string>",
      "status": "<string>",
      "checkDNSRecord": true,
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "id": "<string>",
      "smtp_server": "<string>",
      "smtp_port": 123
    }
  }
}