- Click the cog icon in the top-right corner and then click ‘settings’.
- Click on ‘filters’ and then ‘create a new filter’.
- Enter the domain of the email you want to whitelist in the from field (go.exchange).
- Click ‘create filter’ with this search.
- In the box headed ‘when a message arrives that matches this search’ select ‘never send it to spam’.
- Click the ‘create filter’ button.