Thanks for all the replies everyone!

Actually the sales goal he was referring to is our 'bonus' goal. We have two sales goals - One that is our expected, annual production goal, and a higher one that is our 'bonus' goal. When he wrote that email I was actually on track to meet my annual production goal. If we obtain our bonus goal we get a little higher commission rate but that goal isn't required. My boss only gets paid if his sales agents hit their bonus goal. So in actuality the email he sent me he was clearly demonstrating intimidation for HIS benefit, cleverly worded so it sounded like he was concerned about me. He can be very jovial and personable. I consider him to be what I call a "Happy Huckster".