I had the same problem, so I just set my computer up to block out the D&DH address, (or any other address you don't want to come through). They will go directly into the spam folder where you can either review them, or they can all just be deleted automatically.
You shouldn't have any more of these junk emails again.
Companies should take it upon themselves not to sell personal info of its customers. But if companies feel they can make a fast dollar by doing so, I don't think they will stop. I see it often, some stores you go to ask for your phone number, sometimes your full address or e-mail. they say its for their own records then you start recieving more junk in the mail from different companies. It makes you wonder. Do they all do this?
I love it when I'm asked for my phone number, I then ask them what they need it for.. some places will say they need it to then send me coupons. How will they send me their store coupons by geting peoples phone numbers? Do they use another company which only looks up phone numbers to then find out a persons address? Its ridiculous.
For the past 10 years I have been giving these people that ask a phone number that is not in service. (The company I used to work for had numerous lines, we had a few shut off to save the company some money and since then its been out of service). I don't know if this affects anything but thats what I do.