Whitelist Email Address or Domain

Created by Jackie Little, Modified on Wed, 27 May at 4:39 PM by Jackie Little

Activate admin role.
Go to Microsoft 365 Defender.
Open Email & collaboration > Policies & rules > Threat policies.
Open Anti-span Policies > Anti-spam inbound policy (Default).
Scroll to the bottom of the panel and click Edit in the Allowed and Blocked Senders and Domains.
Add either the email address or email domain you want blocked to the relevant Blocked list.
Save the change.