curl -X POST https://api.mailofly.com/emails \
  -H "Authorization: Bearer mfly_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "hello@yourdomain.com",
    "to": ["user@example.com"],
    "subject": "Hello from Mailofly!",
    "html": "<p>It works! 🎉</p>"
  }'