---
title: 4006: Message send timed out | API Docs
description: The send did not complete within the expected time.
---

The send did not complete within the expected time. Delivered asynchronously as a `message.failed` webhook. The message may still go out after this event fires — a `message.sent` or `message.delivered` webhook for the same message ID can follow. Failures of this class were previously reported under the generic 4001.

## Troubleshooting

- Wait briefly for a `message.sent` or `message.delivered` webhook; if none arrives, retry with a new idempotency key (reusing the original key returns the stored failed message without sending)
- If timeouts persist on one sender line, check that line’s status in your dashboard