I got at least 10 .jar emails within these week ,they are coming from different sites: btc-e,zoomhash,blockchain,x-hash,minereu,zeusminer,wemineltc,bitmaintech,bitpay....
The most creepy thing is I don't even heard some of these names!!why and how they get my address  

Is there any one who know how to stop receiving such kind of email??And how should I defend myself?

I am new here ,any experience will be very helpful,thx!!!