Having no idea what you guys are talking about, I will mention that there is no "Play by mail" achievement in the achievement list at this time, suggesting that whatever that was is gone:)
What New Boxes? I haven't been sleeping under a rock - Yet, but I still have no idea what you're talking bout. I'm in here lookin round since I did notice the GIGPDS boxes are missing; gone.
@Sir Lovealot The skinny silver mailboxes that jump around (that were previously for receiving mail) now allow us to both send and receive mail. No need for the GIGPDS box anymore :)