# email.failed

Event triggered whenever the **email failed to send due to an error**.

This event is triggered when there are issues such as invalid recipients, API key problems, domain verification issues, email quota limits, or other sending failures.

## Response Body Parameters

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 (e.g., `email.failed`).

- `created_at` (string) — ISO 8601 timestamp when the webhook event was created.

- `data` (object) — Event-specific data containing detailed information about the event. The data object for the `email.failed` event contains the following parameters:

::::accordion{title="object parameters"}
* `broadcast_id` (string) — Unique identifier for the broadcast campaign (if applicable)

* `created_at` (string) — ISO 8601 timestamp when the email was created

* `email_id` (string) — Unique identifier for the specific email

* `message_id` (string) — RFC Message-ID header value for the email

* `from` (string) — Sender's email address. For sent events, this matches the value passed at send time and may include a display name (e.g., `Name <email@domain.com>`). For received events, this is the bare email address only; the display name from the original `From:` header is preserved in `headers.from` on the [retrieve endpoint](/guides/receiving-retrieve-received-email).

* `to` (array) — Array of impacted recipient email addresses

* `subject` (string) — Email subject line

* `template_id` (string) — Unique identifier for the template used (if applicable)

* `tags` (Record\<string, string>) — Object of tag key-value pairs associated with the email.

Example:

```json theme={"theme":{"light":"github-light","dark":"vesper"}}
{
  "category": "welcome",
  "user_id": "1234567890"
}
```

- `failed` (object) — Failure details

:::accordion{title="failed object"}
* `reason` (string) — Reason for the email failure (e.g., `reached_daily_quota`)
:::
::::

```json theme={"theme":{"light":"github-light","dark":"vesper"}}
{
  "type": "email.failed",
  "created_at": "2026-11-22T23:41:12.126Z",
  "data": {
    "broadcast_id": "8b146471-e88e-4322-86af-016cd36fd216",
    "created_at": "2026-11-22T23:41:11.894Z",
    "email_id": "56761188-7520-42d8-8898-ff6fc54ce618",
    "message_id": "<111-222-333@email.example.com>",
    "from": "Acme <onboarding@resend.dev>",
    "to": ["delivered@resend.dev"],
    "subject": "Sending this example",
    "template_id": "43f68331-0622-4e15-8202-246a0388854b",
    "failed": {
      "reason": "reached_daily_quota"
    },
    "tags": {
      "category": "confirm_email"
    }
  }
}
```

## Related pages

- [email.bounced](./learn-webhooks-emails-bounced.md)
- [email.clicked](./learn-webhooks-emails-clicked.md)
- [email.complained](./learn-webhooks-emails-complained.md)
- [email.delivered](./learn-webhooks-emails-delivered.md)
- [email.delivery_delayed](./learn-webhooks-emails-delivery-delayed.md)
- [email.opened](./learn-webhooks-emails-opened.md)
- [email.received](./learn-webhooks-emails-received.md)
- [email.scheduled](./learn-webhooks-emails-scheduled.md)
- [email.sent](./learn-webhooks-emails-sent.md)
- [email.suppressed](./learn-webhooks-emails-suppressed.md)

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