Visiteurs depuis le 27/01/2019 : 1456 Connectés : 1 Record de connectés : 20 After you click to another mailbox and then re-click the unread Smart Mailbox, the messages will be gone from the box; the messages however are not deleted. You can find them in the Inbox of your email account(s) in Mail. What this will do is only add your unread emails to the smart mailbox leaving all other emails aside.