curl --request GET \
  --url https://api.coldsend.pro/api/public/v1/domains/{domain_id} \
  --header 'X-API-Key: <api-key>'

{
  "domain_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "domain_name": "<string>",
  "status": "<string>",
  "mailcow_added": true,
  "cloudflare_verified": true,
  "max_inboxes": 123,
  "current_inboxes": 123,
  "created_at": "<string>",
  "cloudflare_zone_id": "<string>",
  "nameservers": [
    "<string>"
  ],
  "dns_records": [
    {
      "type": "<string>",
      "name": "<string>",
      "value": "<string>",
      "ttl": 123,
      "priority": 123
    }
  ],
  "updated_at": "<string>"
}