I ordered from this company once. Fortunately I used a Sneakemail address so I can delete it. Postal spam isn't going to be so easily solved.
In a short time, this email address will start bouncing. Reasons: 1. I never asked to receive your emails. 2. I never asked to receive your catalogues. 3. I attempted to unsubscribe from your emails when I received the last one. It seemed to be successful, but obviously wasn't. Fix your system and respect your customers' wishes or you will lose them. Don't assume they want all your crap just because they ordered from you once. Goodbye. You've lost a customer today. Take me off your postal spam list.