| Name | Type | Description | Notes |
|---|---|---|---|
| FileUrl | string | URL of file to send | |
| PriorityPost | int? | Whether letter is priority | [optional] [default to 0] |
| Recipients | List<PostRecipient> | Array of PostRecipient models | |
| TemplateUsed | int? | Whether using our template | [optional] [default to 0] |
| Duplex | int? | Whether letter is duplex | [optional] [default to 0] |
| Colour | int? | Whether letter is in colour | [optional] [default to 0] |
| Source | string | Source being sent from | [optional] [default to "sdk"] |