Just received another one this morning. Still claiming to be related... sunglasses this time. sigh.
Then there are the ones that want to exchange links with you. Their site is xyz.com and want to put your link on abc.com
Or... they write to you wanting to exchange links, but you have to add your link first, and then they will add theirs.
When I used to do link exchanges, I would add their link and wait for it to be cached by G. Then I would write them a personal email asking for a link and that it was cached etc. I would also find out who I am writing to, and not "dear website owner" type of thing.
Things have changed over the years, and not for the better. :(