SOLVED 550 5.7.520 Access Denied Organization Does Not Allow External Forwarding
If you are receiving "Remote Server returned 550 5.7.520 Access denied Your organization does allow external forwarding" then you likely have outbound spam filter issue in your Microsoft 365 Exchange Online security settings which is easy to fix. The full error is: Delivery has failed to these recipients or groups: recipient Your message wasn't ...
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· Dec 27, 2021