Forum Discussion
Blocking Top Level Domain
Hi all, I am wondering if it is possible to block all emails through Defender from certain Top-Level Domains. In my environment, we get quite a bit of malicious emails from .co.jp addresses, and ...
Sure, you can either use the Tenant Block/Allow List feature (https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/tenant-allow-block-list-about?view=o365-worldwide) or configure a mail flow rule on Exchange side to do the same.