# KlaviyoAPI::EmailSendOptionsSubObject ## Properties | Name | Type | Description | Notes | | ---- | ---- | ----------- | ----- | | **use_smart_sending** | **Boolean** | Use smart sending. Defaults to True | [optional] | ## Example ```ruby require 'klaviyo-api-sdk' instance = KlaviyoAPI::EmailSendOptionsSubObject.new( use_smart_sending: null ) ```