You can opt out of receiving all community emails if you’d wish.
To do so, go to the My Settings > Personal > Email tab.
You can hover over the info icon for additional information. This selection will opt you out of community emails including content subscriptions.
Click the check box next to ‘Don't send me any community notifications’.
Instead of opting out completely, you can also customize the kinds of email notifications you’d like to receive from the Subscriptions & Notifications > Notification settings page.