Would like to invite friends to play , but the delay in sending the invitation mail mailbox within a group of Friends of how to break ! In order to solve the problem of the low rate of part -mail arrives , we landed at the bottom of Home Box joined the " enter invitation code " Shortcut registered way to invite people to open invite panel , see HASH column, this is an invitation code you, tell you friends , eliminating the mailbox can not receive messages of distress it!