Comment Forwarding Rule (Score 1) 333
I had the same problem with some of those "product news" type emails. What I do is go to their website and get their sales email, send a test email to it, just to check for auto responders. Then, create a forwarding rule to forward all their email they send me, to their sales department email (making sure to exclude any auto responders) and delete the original email. Gives you a warm feeling.