Domain - a string containing a domain. Email Addresses can then be created to send & receive email using Email Yak.
CallbackURL (optional) - a string containing a URL. A POST request will be sent to the address provided with information about the email received. If a CallbackURL is specified for both the domain and an address, only the Address CallbackURL will be sent a POST request. Read more about Push Notifications.
PushEmail (optional, default is false) - a boolean containing a true or false value (True / False, true / false, or 1 / 0 are acceptable values). If true, the full contents of the email will be pushed, via HTTP POST, to the CallbackURL. Read more about Push Email.
Status - the status code for the response. Read more about status codes.
Message - a short message with information about your request. If there was an error, a short description of the error will be provided.