I just looked under the "
My Account" options. There is an option called
Notification Preferences. I never looked at this option before, but I did now. It gives you the possibility to "Sign up to receive emails from Warner Bros.". Maybe that helps? Although I'm aware an account here on the site/forum, doesn't necessarily mean it's the same as your game account.
As for receiving the newsletters, I found an old newsletter and clicked the link to update my preferences. There I have the option to change my email address. It doesn't work though. I get an error message (There was an error saving your subscriber information. Please try again later.), so that wasn't helpful at all....
It seems not related to my game account though, so I doubt that it would help if it worked........