Message from Experian saying e-mail and password being sold on a blacklist
We suspected some time ago that an old blueyonder e-mail address had been hacked. We got VM to change this from being our primary e-mail address but we still keep getting spam sent to it and yesterday Experian advised that the e-mail address/password has been sold. We have changed all our details on every account that we can think of and want to make the e-mail address inactive. I have checked on MailTester.com and it says that the e-mail is valid. What do I do to make it invalid?