| Name | Type | Description | Notes |
|---|---|---|---|
| template_id | string | Template ID | |
| contact_ids | string[] | List of contact IDs to send the email to | |
| user_id | string | The user ID to send the email on behalf of | |
| address_field | string | Email field of each Contact record to address the email to, such as 'Email', 'EmailAddress2', 'EmailAddress3' or '_CustomFieldName', defaulting to the contact's primary email | [optional] |