I opened an email last week from greetingcards.org that said I had received an E-card, as soon as I opened it the Antivirus 2008 popped up and I ended up trying so hard to delete i deleted some of my hardware and had to buy a new laptop. The problem is I am getting more emails from greetingcard.org and I cant block them, I'm scared I may open it accidentally. Is there anyway I can prevent it from coming in?

Well not sure why you would have needed to buy a new laptop as I'm sure it could have been repaired.

As for preventing it from coming in you can purchase the FULL version of Malwarebytes which has active protection and it should be able to catch and block it from coming in.