Except now you're opening yourself up to more problems, by being an editor. How do you determine which ones are "legit" or not? How do you deal with those behind the other emails who will claim up and down, all over Twitter and HN and everywhere that they're totally legit, but the big bad censor won't let them send? And, most importantly, how do you deal with the big email providers disagreeing with you, and lowering your company's reputation score as a result, making it harder for you to do business?