Just got this email. Now theres 2 domains with the previous owners whois info.. I've got no idea how to edit it.. also, what the hell is the point of that email.. my domain isn't expiring for another year.
Whomever you registered the domain with is where you need to change it. You are supposed to have current information to comply with ICANN rules. It's usually very simply to do, but if you are having problems, just email your registrar and ask.