babak - just wanted to reply for why i asked RE: headers.. oftentimes, a spammer or phisher will use a fake "from" line - and while part of the headers can be forged, there's an important part that can't be. i received them forged 'from' etrade and citibank...despite not having accounts with them (at the time).
I did not get one of these emails but if I did it would just be deleted: I never open mail from an unknown address even if it is from a known domain. Actually I cant get one of these since our email servers require that the senders address be registered with us before the email is accepted. Adopting this strategy eliminates junk email completely.
I'm guessing here - and this is only a guess. I know on the HK side we are doing some maintenance/upgrades this weekend and we powered down a good chunk of our equipment. If they are doing similar maintenance in the states, it is possible that the server with details and info for the mail was inaccessible and the end result was blank mails going out. Apologies for the confusion.