MailboxGUI

MailboxGUI adds GUI-based letters, packages, COD packages, XP packages, and money mail for Spigot/Paper servers. Supports physical mailboxes, Post Office boxes, Citizens NPCs, Vault economy, Dynmap markers, languages, and 1.18.2–1.21.11 plus 26.1.x.
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MailboxGUI-5.1.0

ByRismr1
  • R
  • Jun 23, 2026
  • 1.89 MB
  • 9
  • 26.2+27

File Name

MailboxGUI-5.1.0.jar

Supported Versions

  • 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
  • 1.20.6
  • 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

# MailboxGUI 5.1.0 Changelog MailboxGUI 5.1.0 is a major stable update that adds Book Letters, expanded COD item-currency support, API 5.1.0 payloads, improved admin inbox tools, network-mode validation, and Paper/Purpur 26.2.x compatibility. ## Important Notes - MailboxGUI 5.1.0 is required for Paper/Purpur 26.2.x compatibility. - MailboxGUI 5.0.1 and older do not support 26.2.x sign updating correctly. - MailboxGUI-DiscBridge users should update to MailboxGUI-DiscBridge 1.1.0 or newer for full 5.1.0 notification support. - Dynmap markers are not supported on 26.1.x or 26.2.x, but core MailboxGUI features still work normally. - Back up your server and `/plugins/MailboxGUI/` before updating. ## Compatibility Supported server versions: ```text Spigot/Paper/Purpur 1.18.2 through 1.21.11 Spigot/Paper/Purpur 26.1.x Spigot/Paper/Purpur 26.2.x ``` ## New: Book Letters MailboxGUI now supports Book Letters alongside Classic Paper Letters. Book Letter features include: - Real Book and Quill writing flow - Protected temporary draft book - Sign-and-close sending - Safe cancel support using `cancel` - Logout cleanup protection - Original hotbar item restoration - Reply links for player-sent inbox Book Letters - Back to Inbox links while reading from the inbox - No reply links for admin/server/API Book Letters - Inbox-only clickable actions removed when a Book Letter is taken from the inbox Player flow: ```text /mailbox Send Mail Letter Book Letter Select Recipient ``` Admin flow: ```text /mailbox admin tools Send Mail Letter Book Letter ``` ## New Admin Book Letter Command Added: ```text /mba sla '' --title