Paul---I've been getting those bogus messages from Robert, as well. I think his e-mail account may have been hacked.
That happened to my Yahoo mail account a year or two ago. My entire contacts folder was stolen and all my friends/business associates began getting e-mails about an electronics store based in Japan. The message made it sound like I was promoting the web store, saying I'd purchased a computer and stereo electronics because their prices and service were so great.
When I received e-mails from people letting me know what was happening, I tried to send an e-mail, only to find my contacts folder was empty! Fortunately, I had printed out a copy of all my contacts e-mail addresses, so all I had to do was re-enter all of the info in a new account.