Webhooks

{
  "type": "email.delivered",
  "created_at": "2026-10-12T09:14:03.117Z",
  "data": {
    "email_id": "4ee5d4c7-1b8b-4a52-a1a6-23c1d8b0e8f2",
    "to": ["ada@example.com"],
    "subject": "Your receipt from Lumen"
  }
}