Confirmed, it works on spongeforge too now!
This serverside mod lets you edit vanilla messages which are not configurable with forge by default.
- Join Message
- Leave Message
- Timeout leave message (since 2.0.0)
- Server stopping kick message (since 1.0.1)
- Server starting kick message (since 1.0.1)
- MOTD while server is starting (since 1.0.1)
- Server starting version (since 1.0.2)
- Server starting version hover message (since 1.0.3)
- Custom Server status (since 2.0.0)
- Randomized MOTD(since 2.0.0)
Use /messagereload to reload the config.
Older versions than the current minecraft version which has forge will not get new features but bug fixes.