# AsyncResponseType

The channels for delivering asynchronous API responses.

## Values

| Name       | Description                                                      |
| ---------- | ---------------------------------------------------------------- |
| `Email`    | The email address to send the response to.                       |
| `FTP`      | Not used.                                                        |
| `HTTPPost` | The callback URL to send HTTP Post responses to.                 |
| `None`     | Indicates that no response is sent for the asynchronous request. |

## Related Items

- [AsyncResponse](/docs/marketing/marketing-cloud/guide/asyncresponse.md)