Mails

MailBox is a premium GUI mail plugin for Minecraft servers with offline/online mail, important staff mail, paginated GUIs, PlaceholderAPI support, permission-based limits, async SQLite/MySQL storage, and full Paper support.

Mails is a free Minecraft Java mod. Compatible with Minecraft 1.21, 1.21.1, 1.21.2, 1.21.3 and newer. Downloaded 25 times (via Modrinth). Download it and open it directly in the game.