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Automatic Retries

Resend attempts to deliver each webhook message based on a schedule with exponential backoff. Each message is attempted based on the following schedule, where each period is started following the failure of the preceding attempt:
  • Immediately
  • 5 seconds
  • 5 minutes
  • 30 minutes
  • 2 hours
  • 5 hours
  • 10 hours
  • 10 hours (in addition to the previous)
For example, an attempt that fails three times before eventually succeeding will be delivered roughly 35 minutes and 5 seconds following the first attempt. If an endpoint is removed or disabled, delivery attempts to the endpoint will be disabled as well. To see when a message will be retried next, check the webhook message details in the dashboard.

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Failure notifications

If a webhook endpoint keeps failing to receive events, Resend disables it automatically and sends an email notification to your team. The email includes the endpoint URL and, when known, how long the endpoint had been failing. Once your endpoint is back up, you can re-enable it from the Webhooks page in the dashboard.

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Manual Replays

If a webhook message fails, you can manually replay it. You can replay both failed and succeeded webhook messages. Replay Webhook Here’s how to replay a webhook message:
  1. Go to the Webhooks page
  2. Navigate to the Webhook Endpoint you are using
  3. Go to the Webhook Message you want to replay
  4. Click on the “Replay” button