How do I add the domain to the Tenant Allow/Block List in Microsoft Exchange online?

1. Open the Microsoft Defender portal: https://security.microsoft.com
2. Go to Email & collaboration › Policies & rules › Threat policies.
3. Under Anti-spam policies, edit the Default inbound policy.
4. Select Allowed senders and domains and add:
   • Domain: raiseaticket.com
   • or Address: support@yourdomain.raiseaticket.com
5. Save your changes.

This globally bypasses EOP filtering for that host.