curl -X PATCH https://api.mailofly.com/api/v1/domains/dom_123 \
  -H "Authorization: Bearer mf_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "click_tracking": true,
    "open_tracking": true,
    "tls_mode": "enforced",
    "tracking_subdomain": "track"
  }'

{
  "data": {
    "id": "dom_123",
    "domain": "example.com",
    "click_tracking": true,
    "open_tracking": true,
    "tls_mode": "enforced",
    "tracking_subdomain": "track"
  }
}