This guide will show an administrator how to create a blacklist enforcement on a desired address or domain to prevent emails reaching end users.
Role Requirements
Procedure Scope: Administrators
Required Group Membership: Admin.Security
Handbook Reference
Package: Email Security
Domain: Sender Block Management
Modifies: Unsanctioned Senders and Domains
Sender/Domain Block
- Navigate to the Tenant Allow/Block Lists – Microsoft Defender portal, locate and select the Block action under the Domains/Addresses tab. A flyout will be displayed where you will be able to specify either the entire domain or specific addresses associated with a domain (max limit of 20) within the Add domains & addresses field. Specify the timeframe as Never Expire from the Remove block entry after dropdown. Lastly provide a reference point for fellow administration on why the block has been instated under the Optional note field. Select Add to finalize the block.
Need Assistance?
Reach out to your Customer Success Manager to discuss how a Sittadel cybersecurity analyst can assist in managing these tasks for you. New to our services? Inquire about arranging a consultation to explore optimizing your Azure environment for painless management.