Mail Beez email blocking from ticket system Customer Info pane

Would be useful to be able to block certain emails being sent to a user from the side of the open ticket 'customer information' pane.

Could be merchant configurable, so for example, the Review Reward email could be blocked, rather then blocking all, which might not be required.

Useful in cases where the store does not want a customer to receive a certain mail after chatting through a ticket - ie, perhaps the customer is a problem customer!