How to white-list the domain under Office365 panel

Step 1: Login to the Office365 admin control panel.
Step 2: Go to Admin > Exchange > Mailflow
Step 3: Click the + and select Bypass Spam Filtering.
Step 4: Apply this rule if… > The sender… > domain is and enter the domain name that you wish to white-list.
Step 5: Under specify domain, be sure to click the + to add the domain to the list.
Step 6: Click ‘Ok’ button and check ‘Stop processing more rules’ option.
Step 7: Click ‘save’ to apply the changes.