that's good. Looks like a lot of mail servers have been compromised by someone; from what I can see most of the hosts sending me this stuff are legit mail servers.
Wish people would learn to keep up with their patches.
And yeah... oh shit is about the right way to put it. It's completely off the hook out there today.
Edit: I might add, from what I see, looks like mostly postfix and microsoft, with a sprinkling of exim.