bitslerrealty? Never heard about this email before, I think it is just a fake.
If it is a real win, there should be a big announcement on this thread as well as on bitsler's official forum. I also never heard about this monthly lottery, afaik there is only daily lottery at bitsler forum. Lets wait for Baryom to confirm, but I doubt the email you have just received is an official email from Bitsler.