If you're set to auto subscribe to threads that you post in you can click the "user cp" thing and then there will be a list of posts that you've recently posted in. Super helpful. Though not quite the unread messages to me.
So go to options, and then I've selected "Do not email" which will subscribe me, but I don't care to receive email about threads I've posted in.
User CP -> Edit Options -> Default Thread Subscription Mode.
I set mine to "No email notification"
I admit, that's awfully confusing to put a negative like that into something where you are looking for some sort of an affirmation. Oh well. No email notification works for me. I suppose if you really like email you could try one of the other options.