After reading this thread yesterday, I received two of those emails, both to different email addresses and both from different people. I hovered my mouse over the links and strange looking info came up. As it happens, I also had an email reply from that email address as I had sent them an enquiry from the email contact form on the official website, reached hrough the Virgin Atlantic site.

I think best be safe than sorry and do not link through these unsolicited emails. Better to reach them through the airline sites.