It also knows my email address? no.
Someone's getting mixed up between tracking cookies and spam-bots.
Not really.
Either you can receive an HTML-based email which contains suitable javascript to do that (though granted most of these are blocked these days)
Or
They manage to inject a suitable bit of HTML/Javascript onto a compromised website that already knows your email address (e.g. say the hacker that got into STW was a bit cleverer and instead of trashing the place just inserts an invisible iframe to scan your cookies and then put that together with your STW email address and send it off to a spammer)
Or
You get a simple blanket spam email that has been sent out to millions and you foolishly follow a link on it which then takes you to a website to harvest that info and put it together with your email address.
But actually…
None of this happens because spam isn't targeted. 😀