email.delivery_delayed

{
  "id": "whev_01h…",
  "type": "email.delivery_delayed",
  "created_at": "2026-07-22T12:00:00.000Z",
  "data": {
    "email_id": "em_123456789",
    "from": "sender@example.com",
    "to": ["recipient@example.com"],
    "subject": "Hello World",
    "status": "sent",
    "error": {
      "code": 450,
      "message": "Mailbox temporarily unavailable"
    }
  }
}

The email.delivery_delayed event is triggered on a transient delivery failure (soft bounce / deferral).

Event Details

All webhook payloads follow a consistent top-level structure with event-specific data nested within the data object.

type `string`

The event type that triggered the webhook (email.delivery_delayed).

created_at `string`

ISO 8601 timestamp when the webhook event was created.

data `object`

Includes standard email fields plus error describing the temporary failure.

Handling this event

When your endpoint receives an email.delivery_delayed event, you might want to:

Track deliverability health without treating it as a permanent failure.
Alert if delays spike for a domain.

email.delivery_delayed

Event Details

type string

created_at string

data object

Handling this event

Learn More

type `string`

created_at `string`

data `object`