Usage: RAKILL <user@host>
Removes a specific global kline from the entire network. As with the AKILL command, any server that is split when you issue this command will not remove the entry.
If you set the global akill and now think it should be removed, you generally should remove it from the entire network. It's not a good idea to leave akills on other servers, because then they may not be noticed for a while and an akill may stay around simply because no one was responsible for removing it.