From the website, click on your name at the top right-hand side of your registry to access the Menu. Go to Settings > Email Preferences. Check or uncheck the boxes according to what content you'd like to see from us. Don't forget to tap that Save button!
If you're on the app, go to the Menu in the top left corner of your screen. Tap Registry > Communication Preferences. Choose the content you want delivered to your inbox and press Save.