Hi Liz, welcome to Scamwarners.
I find it very unlikely that the scammer would go to the trouble and expense to track you down and harm you because you didn't send his fake cheque back, dont be concerned, he will not harm you.
Ignore him, change your email address if you need to, once he realises you will not be sending him any money he will simply move along to the next person to try and scam.
You do need to be aware however that scammers are known to threaten their victims to encourage them to send money, please, no matter what they tell you, do not reply and definately do not send money or cash the cheque.
If you do recieve a cheque, you can do any one of a number of things with it;
Take it to the local police station and explain the circumstances, chances are they will do nothing about it (unless you have been threatened then they may look into a bit more)
Completely destroy it and throw it in the bin
Write fake clearly on both sides in big letters and keep it as a reminder
If you live in the US, take it to your local post office (postal service I think they call it)
For the members of our support team, we take our anonymimity very seriously, we have cost scammers huge amounts of money in many cases and we continue to, remembering these people are criminals who have the capacity to track us down if so provoked, which is why we do not give out details that will identify us.
In your case however, he has wasted maybe a few dollars on you and he lives on the other side of the world, even if he only lived on the other side of town he wouldn't bother with you.
Just ignore him, if you would like us to tell you where the emails were sent from we may be able to find out by looking at the email headers