Sends a specified campaign to one or more address books, segments or contacts at the most appropriate time based upon their previous opens
This operation sends a specified campaign to as many address books and segments as you choose at the most appropriate time based upon their previous opens. However, when sending to contacts, you can only send up to ten in a single call. It allows you to send to a single contact if you wish.
Does not count towards your API call limit
This call is not counted as part of your hourly API call limit.