This script is being rewritten fully for the next update with more features.
But as of right now, this script does allow anyone to have their own mailbox with a key, yes it is a generic key item, but it uses Ox Inventory’s ability with meta data to write a mailbox ident to the key so it will only work on the assigned mailbox, like how a real world post box key would.
As of right now the other players can add items via dropping them into the mailbox, as anyone can put something in the mailbox, only the key holder can remove an item.