| Name | Type | Description | Notes |
|---|---|---|---|
| Source | string | Your method of sending e.g. 'wordpress', 'php', 'c#'. | [optional] [default to "sdk"] |
| To | string | Recipient fax number in E.164 format. | |
| ListId | int? | Your list ID if sending to a whole list. Can be used instead of 'to'. | [optional] |
| From | string | Your sender id. Must be a valid fax number. | [optional] |
| Schedule | int? | Leave blank for immediate delivery. Your schedule time in unix format http://help.clicksend.com/what-is-a-unix-timestamp | [optional] |
| CustomString | string | Your reference. Will be passed back with all replies and delivery reports. | [optional] |
| Country | string | Recipient country. | [optional] |
| FromEmail | string | An email address where the reply should be emailed to. | [optional] |