---
page_type: error
code: 11217
message: "11217: HTTP error response code"
level: ERROR
---

## Description

Twilio sent a webhook to your server and your server responded with a 4xx or 5xx status code.

### Possible Causes

- There was an error in your server (500).
- There was a problem between your proxy and your server (502, 503, 504).
- The URL specified in your webhook configuration is incorrect (404, 410).
- Your server is attempting to rate limit Twilio's webhook requests (429). Twilio's webhooks do not support rate limiting.
- Your webhook configuration does not have appropriate permissions to call the configured URL (403).

### Possible Solutions

- Review the configured webhook URL to ensure that it is correct.
- Look for and fix errors in your server logs.
- Ensure that you can get 2xx status codes by calling your webhook URL.
- Review your proxy and authentication configurations.
- For rate limiting issues, consider shifting to Event Streams HTTP Sink which [support rate limiting](/docs/events/faq/problems-on-delivery#what-does-throttle-sink-means-for-eventstreams).