In-Game Mailbox

I would like to put this suggestion forward after just logging onto the website to find out ive got 7 new messages, Dating back 2 days, And ive lost all 7 sales because of this, Are you able to intergrate a Mailbox of some sort into the game whether it be a physical object or a button that can be pressed while you are playing...

Thanks.

Well, essentially such ends up becoming the new trade system, because the mail messages themselves would carry the data of the offer.

So, I'd think doing this before the new trade is ready (if it's going to be a awhile) would be nice.