OpenSend docs
email.sent
Provider send notification received.
When it is emitted
SES/SNS lifecycle ingestion normalizes provider Send events to email.sent.
Payload
OpenSend sends this event in the standard webhook envelope:
json
{
"id": "whd_delivery-id_1",
"type": "email.sent",
"created_at": "2026-05-10T00:00:00.000Z",
"data": {}
}Use this event to mark messages as accepted by the sending provider. The payload is the provider send payload stored by the ingester.
Handling guidance
Verify svix-id, svix-timestamp, and svix-signature before processing. Store idempotency by delivery ID or by the domain/email/contact ID in data so retries and replays do not duplicate downstream side effects.