CustomJoinMessages
Is a Bukkit Plugin which allows you to change or turn off the join and quit messages of Minecraft.
Important:
For this plugin to work you need the LuckPerms plugin.
Configuration:
The configuration file is located under plugins/CustomJoinMessages/config.yml
● This plugin can also completely disable the messages that appear when someone joins or leaves the server, which can be annoying or visually unappealing.