2day i recvd 1mail from "Netherland Lottery Promotion 2007" with subject congratulation, i won 1,500.000 Euro

with some sr.no, batch no. lott. ref. no, drew luck no. and asked to fill 1 format to claim the prize. I never heard about that lott. or purchased anything. they given 1www.lotto.nl site. what to do?