delay delivery / schedule an email option

Barrie & Team:  I desperately need a way to schedule follow up emails for a 2-3 weeks after a challenge pack purchase to remind challengers to update home direct and/or convert to a discount coach before their next order.  Is there any way this is on the horizon?  I can schedule a f/u, but it would be much more precise and helpful if at the time of the CP sale I could auto schedule an email to go out 3 weeks from that date.  Then I don't have to worry about a missed follow up.  

Best, Caroline 214-356-0704