Event Types

Reloop supports the following active event types. Each delivery uses a consistent top-level envelope; event-specific fields live under data and use snake_case.

Email lifecycle

Email data shape (outbound)

{
  "email_id": "em_…",
  "from": "Acme <onboarding@example.com>",
  "to": ["user@example.com"],
  "subject": "Hello",
  "status": "delivered",
  "error": {
    "code": 550,
    "message": "User unknown"
  },
  "url": "https://example.com/path"
}

• error is present on bounce, delay, complaint, and failure events.
• url is present on email.clicked.
• scheduled_at is present on email.scheduled.

Inbound email.received data shape

{
  "email_id": "in_…",
  "mailbox_id": "mb_…",
  "from": "sender@example.com",
  "from_name": "Sender",
  "to": ["inbox@yourdomain.com"],
  "cc": [],
  "subject": "Inbound Message",
  "thread_id": "thr_…",
  "has_attachments": false,
  "is_spam": false,
  "status": "received",
  "message_id": "<rfc822@id>"
}

Domain lifecycle

Domain data shape

{
  "id": "dom_…",
  "name": "example.com",
  "status": "active"
}

API key lifecycle

API key data shape

{
  "api_key_id": "key_…",
  "status": "disabled",
  "action": "revoked"
}

status and action are optional and only set for some transitions.

Contact lifecycle

Contact data shape

{
  "id": "con_…",
  "email": "contact@example.com",
  "first_name": "Ada",
  "last_name": "Lovelace",
  "status": "subscribed"
}

Contact group data shape

{
  "id": "grp_…",
  "name": "VIP"
}

Envelope

{
  "id": "whev_…",
  "type": "email.delivered",
  "created_at": "2026-07-22T12:00:00.000Z",
  "data": { }
}

Coming soon (not subscribable yet)

These event IDs exist in the catalog but are inactive until the pipeline emits them:

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Learn More

• Introduction
• Verify Webhooks Requests
• Retries and Replays