I can tell you that the email you're referencing DID NOT come from DomainSponsor. I've checked interally and no one has sent out anything like what's being described. Most, if not all, communication from DomainSponsor will come from
DSSupport@domainsponsor.com.
At this point it's unclear to me whether this email is attempting to intentionally misrepresent itself as being sent from DomainSponsor, but we obviously take this very seriously and are in the process of investigating further.
Thanks,
DSSupport