Here's what dnsstuff.com has to say about the first one:http://www.dnsstuff.com/tools/whois....po.vj49rs.info

I have no idea what they do, and right now I haven't got time to explore more fully, but check out dnsstuff.com

Edit: Might also want to forward to earthlink, if you still have that email. What were the internet headers, by the way?

I suspect they are bogus links to try and get past spam filters.