You can now connect to MeepCraft with Minecraft 1.11 clients! The ability to use the new items and blocks will be included in a later update.
As of Dec 29 2016, MeepCraft has been blacklisted by Mojang. We are working to determine the exact cause so that we can resolve the situation as soon as possible. I am looking forward to fix this so you can get back to enjoying MeepCraft!