Parse.com Mandrill Send with Promise

gistfile1.js

// This method sends an email via Mandrill. It returns a promise chain
// so that it can be more neatly included as part of a promise chain. 
var sendMandrillEmailPromise = function(message,send_at){
    var promise = new Parse.Promise();
    Mandrill.sendEmail({
        message: message,
        async: true,
        send_at: send_at
    },{
        success: function(httpResponse) {
            promise.resolve(httpResponse);
        },
        error: function(error) {
            promise.error(error);
        }
    });
    return promise;
}