I’d like to bump this. I’m not saying never ever pass on your email address, but never do it in a situation like the one described here. Be very very sure about what you are doing. It sounds like a phishing expedition. I have a few friends on here that have my ‘throw away’ email for very specific reasons. But I’m still very cautious.
The bottom line is it’s a lot easier to release your email address to other online entities than it is to clear up the damage that might result from doing it. Sad to say, there’s some dodgy people out there.