MailboxGUI

Give players GUI mailboxes with paper and book letters, 28-slot packages, money mail, and Cash-on-Delivery. Includes scheduled delivery, public mailboxes, NPC access, custom GUIs, 16 languages, localized commands, storage options, and powerful admin tools.
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MailboxGUI-6.1.0

File nameMailboxGUI-6.1.0.jar
Uploader
Rismr1Rismr1
Uploaded
Oct 10, 2026
Downloads
7
Size
6.2 MB
File ID
9115799
Type
R
Release
Supported game versions
  • 26.3
  • 26.2
  • 26.1.2
  • 26.1.1
  • 26.1
  • 1.21.11
  • 1.21.10
  • 1.21.9
  • 1.21.8
  • 1.21.7
  • 1.21.6
  • 1.21.5
  • 1.21.4
  • 1.21.3
  • 1.21.2
  • 1.21.1
  • 1.21
  • 1.20.6
  • 1.20.5
  • 1.20.4
  • 1.20.3
  • 1.20.2
  • 1.20.1
  • 1.20
  • 1.19.4
  • 1.19.3
  • 1.19.2
  • 1.19.1
  • 1.19
  • 1.18.2
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What's new

MailboxGUI 6.1.0

Customizable Mailboxes, Messages, and Localized Commands

New Features

  • Added optional messages to packages, COD packages, and money mail through player composition, admin tools, commands, scheduled mail, and the API.
  • Added optional gui.yml customization for GUI controls, mail appearances, recipient icons, and floating new-mail notification items.
  • Added optional ItemsAdder integration for custom GUI appearances, with built-in icon fallbacks.
  • Added resource-pack appearance preferences through /mb settings resourcepack on|off|auto.
  • Expanded package composition and management to 28 content slots.
  • Added Brazilian Portuguese, bringing language support to 16 languages.
  • Added localized command syntax, help, and tab completion. English commands remain available.
  • Added compact HEX colors and supported visual MiniMessage formatting.
  • Added separate paper-letter and book-letter sending settings.
  • Added customizable book information pages with built-in Reply and Back controls.

Improvements and Fixes

  • Improved custom item metadata preservation in packages and item templates.
  • Improved package, COD, and money-message preservation through storage, reloads, delivery, and returns.
  • Improved live inbox refreshes, package management, and claim checks.
  • Added an administrator Shift-Right-Click package deletion action.
  • Improved message wrapping, manual line breaks, and notification formatting.
  • Improved delayed delivery, scheduled-mail handling, and storage upgrades.
  • Improved configuration synchronization while preserving customized settings and language files.
  • Expanded public APIs and PlaceholderAPI integration.
  • Renamed Post Office terminology to Public Access Mailboxes and Public Access NPCs, preserving existing registrations.
  • Integrated optional DiscBridge controls under /mb settings discord and /mba discord.

Upgrade Notes

  • Back up the complete MailboxGUI folder and database before updating.
  • Keep existing configuration, language, and data files so upgrade handling can preserve your customizations.
  • MailboxGUI 5.1.1 and older are no longer supported. Update to 6.1.0 before requesting support.
  • GUI customization is disabled by default. Enable gui-customization.enabled, then run /mba reload to generate and load gui.yml.
  • Set locale.command-syntax.default before startup. Changing registered command syntax requires a server restart.
  • Optional Discord integration requires the matching DiscBridge 2.1.0 edition and DiscordSRV.

All Relations

  • All Relations
  • Embedded Library
  • Optional Dependency
  • Required Dependency
  • Tool
  • Incompatible
  • Include