Go to "User CP" higher on this page in the bar. Then, under "Control Panel" on the left side, go to "Edit Options." A ways down the page, toggle to indicate that you do not want to subscribe to email notification. You will probably continue to receive notifications on topics that you were in prior to changing the setting, but you can cancel them individually as they come in (see hyperlink on the page).
...and that's the way it is in northern Minnesota.