The Missertross Poste
The name may not give it away, but the Missertross Poste is your mailbox. You get messages there. The top part, named orders, is orders from your Betters. The bottom part is, simply, messages from other players. You can read them! You can reply to them! You can throw them away! You can leave them alone perpetually, and let them Pile Up! It's all, really, up to you.
Please be aware that the game admins monitor, and at need, read, the messages sent via the Missertross Post.