In my case they were mostly notifications from FB, junk emails, some spam, notifications of new blog posts, newsletters, sales offers from places I shop onlin AND some personal emails. I have a SIL that's a shutterbug and she sends me pictures constantly. I had tons from her. Those I sorted into another folder to look at later since I was on a mission to clear out my inbox which HEY has 4 unread messages in my inbox now! Off to delete! :D :p