Hi,
Every time i mute a player, they can still talk on clan chat.
I believe it's a SimpleClans' issue, since other chat commands are blocked.
Maxbans config: http://pastebin.com/BnT3geRB (look at chat-commands section)
Maxbans version: 2.3
SimpleClans version: 2.5.5
Server version: Spigot 1.8.3 (git-Spigot-870264a-0a645a2 (MC: 1.8.3) (Implementing API version 1.8.3-R0.1-SNAPSHOT))

Update: Players that are not part of a clan get the /. command blocked while muted.

#475 brought Chat Event.
Solution: cancel it.

https://github.com/marcelo-mason/SimpleClans/blob/master/src/main/java/net/sacredlabyrinth/phaed/simpleclans/listeners/SCPlayerListener.java#L91
Why do you cancel this event? I think that this is the cause of the problem...