Message
Authenticate
Payload fields
| to | Address, list, or comma-separated addresses |
|---|---|
| from | Allowed sender address |
| subject | Subject · optional |
| html | Message body |
| use_html | HTML mode · false by default |
| delay | Delay in minutes · optional |
| scheduled_time | ISO 8601 date and time · optional |
| attachments | List of {filename, content} · base64 content |
Bearer token or token in JSON. A new login replaces the previous token.