Any way to have email badge show newly unread messages, not just all unread?

[AC Question]

My old Blackberry finally died, and I've switched to Android. I see that the email badge shows the number of unread messages, which is similar to Blackberry, but here it's ALL unread messages. If I open the email app and see a bunch of new emails, some of which I want to read, and others that are junk and not worth the time to open, I'd like to then have the email badge revert to zero, so the next time I look at my phone I can see how many new messages I now have (I know it also shows in a bar new messages, but this gets muddled up with other new stuff. I'd like still to be able to glance at the email badge and see how many new messages there are). Any way to do this?