I was able to mess with the normals and removed all doubles and this is what I was able to come up with. That will still not go away unless I change the texture to diffuse, and it's not a shadow: I've moved my lights and camera trying to see but it wasn't.
So did all that stuff and still no luck, It did make it look better but on the angle that I want for the pic there is still an area. I have found that if I rotate the camera there are certain areas where this "shadow" does not occur. I also checked to see if maybe the letters or the top of the mailbox was casting a shadow in some way, but that was not. I also moved my light sources around, took away the floor, and added more objects around to see if it would work. Well it still has that unsightly shadow, although it does look better I'm just surprised there is no way to get rid of that black shadow that I know of.
Here is a pic of my current progress
It's kind of hard to see in that pic but at the bottom right corner there is still a weird shadow. Also I found if I take off the top there is an unsightly shadow on the top of the main mailbox mesh. And this is after I deleted duplicates and checked my normals, etc.