We have received several reports from clients who had received an e-mail claiming their domain name to be suspended. It looks like not just our clients are being targeted, as we are seeing other registrars sending out similar warnings.
The e-mail seems to come from the abuse contact in the public whois of your domain name (something like law-enforcement-only@NameWeb.biz for example), but is actually sent by spammers who try to send you a virus.