If they have your IP, and your only using windows firewall or some other crap firewall, and dont have a good anti virus (a real pro AV), then you could well be fxcked.
I suggest you get a good pro firewall, and if you wana report it then you can report it to the IC3 probably, or check here http://www.met.police.uk/computercrime/
But if you did send those emails off your computer, i wouldnt bother contacting any of them, as they have expert computer forensins who will find out wether or not you actually did send those emails, even if you delete everything or w.e







