I used to get these emails pretty badly until I got domain filtering. Pretty nice stuff if you own the domain (and you own a dedicated / virtual server...) you can not only block stuff like this from your account, but everyone else on your domain as well. Pretty neat. Although I must say, the emails as specified above, we have to root block those which every now and then means that I gotta go and re-enable @aol.com from being banned... (why spammers use AOL I will never know...)