Inbox size limit. This option allows you to set a limit to the size of the inbox for certain usergroups. A visual percentage bar and text is displayed on the conversation list page, giving your members a clear indication of exactly how much space they have left in their inbox. Once the limit is reached, the user is prevented from starting or receiving new conversations. Should a member be blocked from receiving a conversation, they will get an alert indicating that person X has tried to contact them but could not get through due to their inbox being full.