---
title: 4005: Recipient does not support this message type | API Docs
description: The recipient cannot receive this message type.
---

The recipient cannot receive this message type. iMessage app messages require the recipient to be reachable over iMessage and do not fall back to SMS/RCS. This is an HTTP 422 error, delivered asynchronously as a `message.failed` webhook.

## Troubleshooting

- Confirm the recipient is iMessage-capable before sending app messages — see the [iMessage capability check](/guides/messaging/protocol-selection#protocol-capabilities/index.md)
- Or send a standard text or media message, which can fall back to SMS/RCS

## Related

- [iMessage Apps](/guides/messaging/imessage-apps/index.md)
- [Webhook Events](/guides/webhooks/events/index.md)
- [Error Codes](/error/index.md)