# 11217: HTTP error response code

Log Type: APPLICATION

Log 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/event-delivery-and-duplication#what-does-throttle-sink-means-for-eventstreams).