/emails/{id}/cancel
curl -X POST "https://example.com/emails/497f6eca-6276-4993-bfeb-53cbbbba6f08/cancel"{ "object": "email", "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08"}curl -X POST "https://example.com/emails/497f6eca-6276-4993-bfeb-53cbbbba6f08/cancel"{ "object": "email", "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08"}