MOD IN VERY EARLY DEVELOPMENT

Expect visuals and functionality to change, if you dont like how something looks don't worry, it's probably going to change in the future, for now it's mostly focused on functionality

How to use the mod:

Envelope-with an empty envelope in your mainhand and an item you want to put in the envelope in your offhand right-click to put the item in the envelope, a gui will then appear asking you to input an adressant, you can put any text in there its up to the players to decide what to do with that information, it will be visible as a tooltip in the closed envelope, to get the item out of the closed envelope just right click it again and you get both the opened envelope and the item back

Postboxes-they have two inventories a receiving inventory and a sending inventory, to put mail in the sending inventory simply right click the postbox with a closed envelope and it gets put in the inventory, to put letters in the receiving inventory crouch while right clicking to put it there, to take mail out rather than clicking with a closed envelope click with an empty hand, however mind that the order of the inventories is reversed then so taking out of the sending inventory is done with crouching and the receiving without (i am planning to simplify the process with a gui that just has theese two inventories below eachother to make it easier)