1. Navigate to the outlook webpage and login
2. Click the settings icon in the top right
3. Click "View all Outlook settings" at the bottom
4. Select the menu called "Junk Email"
5. Under the "Safe senders and domains" tab click "Add"
6. Enter the email address in full or just the ending part to add everyone with that email to the safe senders list (EG: firstname.lastname@example.org would be a single user and durring.com would be anyone with a durring.com email address)
7. Click save in the top right