Just unsubscribe to newsletters. Just follow these simple steps:
Each newsletter has an unsubscribe link at the bottom. Click it.
You'll be taken to your profile (login if you already haven't)
Click notifications, then untick the newsletter box and save your profile.
If you are unable to login to your account, you are still able to login to your account by going to http://community.iclanweb ... sites.com.
You can access your profile and notification settings there.
After actioning either of these, you will no longer receive the newsletter.