This feature is available on all Goodshuffle Pro Plans.
Gmail users - move us to your primary inbox:
On your phone: Hit the three dots at the top right corner, click "Move to" then "Primary".
On a desktop: Drag the email you want to move into the "Primary" tab at the top of your screen.
Apple mail users - Click on our email address at the top of the email and click "Add to VIPs".
If you're not using Gmail or Apple Mail, you can follow these instructions.