By the way, it is a very bad idea to post any redemption code or any other personal information here. These are public web pages, so any such information could easily be abused. I've asked the Communities Hosts to remove the code you provided.
From other reports I've seen, the code in the email is to unlock a PDF attached to the email that contains the code you actually use to redeem in the Mac App Store. Perhaps that might apply in your situation?