As AP holders, we get email codes quite frequently for both our AP and just general, unrelated codes, I believe because we signed up for the Disney Insider, free on Disney's website.
I question, though, why you need to receive these emails at all? If you go to mousesavers online, specifically
http://www.mousesavers.com/disneyresorts.html#discountmenu, you can get codes year round that are similar, if not exact, discounts that you get from these emails. I always glance at the codes from emails (with PIN) or the Mickey Monitor that Disney sends, but have never used one because I can go on mousesavers a get the same discounts.
Other than being able to come onto the Disboards and brag to everyone that you got a discount code email

, these emails are overrated, IMO.