curl --request POST \
  --url https://app.spotzee.com/api/ext/generic/email/mx-lookup \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data domain=example.com

{
  "status": "success",
  "data": {
    "exists": true,
    "records": [
      {
        "exchange": "mail.example.com",
        "priority": 10
      }
    ],
    "domain": "<string>"
  }
}