[otrs] Controlling Email Notification in OTRS !!

Hi, I have a OTRS system with around 600 users. To avoid everyone can enable Email notification for new ticket, ticket update and ticket move, I want to create a control mechanism. Wherein only root@localhost can give permission for Notification through email. I have tried in disabling the option from Sysconfig => Ticket -> Frontend::Agent::Preferences "New Ticket notifify" and others. But this hides the option in both Agent console and root@localhost admin console. Is there a way, I can create a role, group or ACL to contol which users can enable notification through email, to avoid the load in Email server. Senthil