---
title: 2008: Recipient not allowed | API Docs
description: Recipient is not in the allowed list for this account.
---

Recipient is not in the allowed list for this account. This is an HTTP 403 error indicating you cannot send messages to this recipient.

## Troubleshooting

- In sandbox mode, recipients must message you first before you can send to them

## Related

- [Sending messages](/guides/messaging/sending-messages/index.md)
- [Debugging](/guides/platform/debugging/index.md)