This plugin adds a very easy to use maintenance mode to your server. In case your production server is up, and yet you still need to do something before letting players in.
Supports PlaceholderAPI.
First of all, you need to give the permission mcn.maintenance.allow to everyone who has to have access during the maintenance period, and then just write /maintenance enable. It will kick all other players, and not let them in till the maintenance period is over. You can disable the maintenance mode by writing /maintenance disable. You can also change the kick message and customize MOTD during the maintenance period by editing config.yml. For changes to take effect you either need to run /maintenance reload or restart the server.
Spigot/Paper/Bukkit 1.16.5+
