I've heard about these emails forever but had never received one. (And despite gMail being the greatest email provider ever, even I'm surprised it flagged the message with the warning.)
I know one of the boys at The Ticket fell for this, and I kind of remember hearing about someone from Wise County. Oddly, this email was "from" an agent with Century 21 who I had only shared one email with in the past. I guess that's all it took.