# Cancel a scheduled or queued message before it leaves

`POST /mail/messages/{id}/cancel` · Rivier · campaigns

Cancel a scheduled or queued message before it leaves.

- Scope: campaigns:write
- Mcp: rivier_campaign_mail_cancel
- Graphql: Mutation.campaignsMailMessageCancel
- Sdk: mail.messages.cancel
- Cli: mail cancel

## Parameters

- `id` (path, required), string

## Responses

- `200`: Success
- `400`: The request was malformed
- `401`: No valid credential
- `403`: The credential lacks the scope, origin or address
- `429`: Over the key's rate limit; see Retry-After

## Example

```sh
curl -X POST 'https://api.rivier.ai/mail/messages/{id}/cancel' \
  -H 'Authorization: Bearer $KEY'
```