Limit the messages per hour

My host requires me to send less than 400 messages per hour.

Will these settings do?
define('MAILQUEUE_BATCH_SIZE', 350); // to make sure it's not 400 define('MAILQUEUE_BATCH_PERIOD', 3600);

But what if I also want to use:
define('USE_DOMAIN_THROTTLE', 1); define('DOMAIN_AUTO_THROTTLE', 1);
?