MailboxGUI v3.1.1 is a beta file of the Minecraft plugin MailboxGUI, made for Minecraft 1.20.6, 1.21.2, 1.21.3, 1.19.3, 1.20.2, 1.21.8, 1.20, 1.20.4, 1.21.4, 1.19.2, 1.20.5, 1.21.5 and more. It was published on April 30, 2026 and is 0.5 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the MailboxGUI plugin page.
How to install: Put the .jar into the plugins folder of your Paper, Spigot or Bukkit server and restart the server.
