Microsoft Email Security
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      Spoofed Sender Block

      This guide will allow administrators to create a blacklist enforcement on the provided domain pairs.

      Role Requirements

      Procedure Scope: Administrators

      Required Group Membership: Admin.Security

      Handbook Reference

      Package: Email Security

      Domain: Sender Block Management

      Modifies: Unsanctioned Spoofed Senders

      Spoofed Sender Block

      1. Navigate to Spoof Senders – 365 Defender, select the Add option to initiate the process. A pop-up will be displayed where you will specify the domain pairs, External spoof type, and the Block action. Select Add to finalize the block creation.

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