| Name | Type | Description | Notes |
|---|---|---|---|
| contacts | string[] | An array of Contact Ids to receive the email | |
| subject | string | The subject line of the email | |
| attachments | \Keap\Core\V2\Model\EmailSendRequestAttachment[] | Attachments to be sent with each copy of the email, maximum of 10 with size of 1MB each | [optional] |
| user_id | string | The user ID to send the email on behalf of | |
| html_content | string | The HTML-formatted content of the email, encoded in Base64 | [optional] |
| plain_content | string | The plain-text content of the email, encoded in Base64 | [optional] |
| 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] |