There are three options.
Option 1) Download the &frankly app. By doing so, you can get notifications in your phone instead of an email.
Option 2) Login to &frankly on your device and go to Account > My settings. Select the kind of notifications you would like to get for new questions and new results. If you don't want any, simply opt-out from all of them.
Option 3) If you want to stop emails completely, in the next e-mail you receive (or find an old one, if you’ve already reached your maximum) scroll down to the very bottom and press “unsubscribe”.
You can always log in to your account and change your settings if you change your mind!