# MailchimpTransactional::Body13 ## Properties Name | Type | Description | Notes ------------ | ------------- | ------------- | ------------- **key** | **String** | a valid api key | **raw_message** | **String** | the full MIME document of an email message | **to** | **Array<String>** | optionally define the recipients to receive the message - otherwise we'll use the To, Cc, and Bcc headers provided in the document | [optional] **mail_from** | **String** | the address specified in the MAIL FROM stage of the SMTP conversation. Required for the SPF check. | [optional] **helo** | **String** | the identification provided by the client mta in the MTA state of the SMTP conversation. Required for the SPF check. | [optional] **client_address** | **String** | the remote MTA's ip address. Optional; required for the SPF check. | [optional]