JohnRoy, I receive similar emails. They all state they are related. None of them ever are. I really do think that they never even visit the site in question.
I've had them asking for drug sites, xmas trees, outdoor sports.
I did write to one of them once. They said that their site is PR4 and your link is on example.com/links.php
I had to explain to them that their homepage is PR4 and the page that you put my link on isn't even cached. I then told them that PR stands for page rank, not site rank. I never heard back, but similar email come... but I delete them from the server and do not even bother downloading them.