If you would like, you can opt out of receiving all community emails.
To do so, go to the My Settings > Personal > Email tab.
You can mouse over the info icon for additional information. This selection will opt out of community emails, including content subscriptions.
Click the check box next to "Don't send me any community notifications."
Click Save.
Instead of opting out completely, you can also cusomize what kinds of email notifications you receive on your Subscriptions & Notifications > Notification settings page.