I heard about this earlier on in the year. People in my neighborhood
were asked to report the letter if any of us found it in our inbox,
because several people received this type of message. It's just
another one of those mass-mailing-money-making-scams. I highly doubt
that any of those people would be harmed.
Those messages would usually be sent to your spam-mail, depending on
your spam-mail filter. If it's a maximum level filter, those messages
shouldn't even be found in your inbox.