This is server-side only mod. No client side modifications are required.
Configure messages for MotD greetings when player joins server.
Add periodic messages to be sended by the server to the players.
Current version (standalone BasilMod::motd without BasilMod::pack) limits message length to 230 letters.
You can have multiple messages added. Message order is preserved.
This mod is part of BasilMods pack.
Screenshot demonstation.
Server-side installation.