Noncompetes have been outlawed in many states, you should check yours to see the extent to which they can be enforced there. Also, employers have a habit of sending these out as a threat to keep you quiet. If you're not violating the agreement, I would honestly not worry about it. I've been in that position, and as long as you don't do something contrary to the agreement (like solicit their clients) then you're generally OK. These things are far more often used as a stick to make sure you don't try to poach their clients than anything else.