How to Enable Reject Direct Send in Exchange Online (Public Preview) via PowerShell

In this video, learn how to enable the "Reject Direct Send" feature in Exchange Online (Public Preview) using PowerShell. This new capability helps administrators block messages sent from external systems that try to bypass authenticated relay methods and directly send emails to Exchange Online.

We'll walk through:
✅ What "Reject Direct Send" does and why it matters
✅ Prerequisites for enabling the feature
✅ Step-by-step PowerShell commands to configure it
✅ Verifying that the feature is active

🔒 This setting is especially useful for hardening mail flow security and ensuring only authorized sources send mail to your tenant.

📌 Note: As of this video, the feature is in Public Preview and subject to change.

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Disclaimer:
The information provided in this video is for educational and informational purposes only. While we strive to ensure the accuracy and relevance of the information shared, it should not be taken as professional or official advice. The views expressed in this video are personal opinions and do not necessarily reflect those of my employer or any affiliated entities.

Please note that some topics discussed may involve specific software, tools, or platforms. Always consult the official documentation, seek professional assistance, or consult your organization’s policies before implementing any suggestions from this video.

I am not responsible for any loss, damage, or inconvenience caused as a result of the information presented. Use the content in this video at your own discretion and verify any actions before applying them in your environment.

Видео How to Enable Reject Direct Send in Exchange Online (Public Preview) via PowerShell канала The Azure 365 Hub