In the game of Minecraft multiplayer, you can private message each other, like Pocket Legends, except you can also send mail. Mail is useful for communicating with people while they arent on, for example: "Hey dude im going to be gone for a week, just in case if you will be wondering why, im going on vacation." If the offline player isnt on, you cant say that last message. So yeah, mail is useful. in PL format, maybe you can type /mail <player name> <message> or /m <player name> <message>. This can be very useful for Star Legends and Pocket Legends. If you want to check your mail, type /mail check, and to clear mail, type /mail clear. I dunno i think this is a good idea.