Add the ability to set at fixed send date for a follow up email in Follow-Up plugin
I would like to be able to send the email at a specific date (used together with e.g. "purchase complete status"), rather than at a certain amount of time after the purchase/status change. My client is selling online courses, and we would like to send out the course info on the specific date when the course starts, as well as a week before (for those who have already bought the course by then).
