You can send in-game letters to other users. Here are the commands:
- /letter [text]
- Creates a Courier Letter with the supplied text. Hold the Letter in your hands and write /letter [text] again to add more text to the Letter. Use &nl or \n to insert newlines. Multiple page Letters are supported, use right-click and left-click to turn the page.
- /post [playername]
- Sends the Letter held in your hands to another player, name verified to be a player on the server. Depending on the config, the received Letter will be privacy-locked to that player (can be unlocked by simply adding text to it with /letter).
- /courier unread
- Requests re-delivery of all unread mail, even if they have been delivered to you before. Courier knows the difference between a mail having been delivered and actually read, and this is meant to be used in the cases where you’ve managed to misplace the Letter without having read it first.
The courier takes some minutes to arrive at the recipient. Further, if you receive a letter, You can store it in a chest. If you lose it, it’s gone forever.