This could be helpful if you use the read/unread status as a pseudo to-do list, but if you don't, it won’t make a huge difference in your workflow. This inbox filter simply makes all unread messages in your inbox take priority over recent messages.But these newsletters will make you laugh, smile - and maybe even feel a little more. Yes, you're trying to hit inbox zero and cut back on email. 14 Newsletters You Should Have In Your Inbox.