To block or allow email addresses at the tenant level go to
Security admin centre
https://security.microsoft.com/homepage
Policies & Rules>Threat Policies>Anti-Spam>Anti-Spam Inbound Policy
Can either allow\block particular senders or domains.
Adding Email to Allowed/Block lists Print
Created by: Jon House
Modified on: Wed, 6 Apr, 2022 at 1:44 PM
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