Category Archives: Microsoft

Fix Remote server returned ‘550 5.7.520 Access denied, Your organization does not allow external forwarding

This is a security feature from Microsoft 365 where it will block emails from being forwarded outside the tenant. If you get such a message, this means that the recipient has forwarding set outside its tenant. To allow this feature, follow the below guide.

Open the Office 365 Admin Center and click on Security.

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Under Email & Collaboration, click on Policies & Rules.

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Click on Threat Policies.

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Click on Anti-Spam under Policies.

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Click on Anti-spam outbound policy (Default).
Scroll down and click on Edit protection settings.
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Under Forwarding Rules, change the Automatic forwarding rules from Automatic – System-controlled to On – Forwarding is enabled.
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Click on Save.