If you are an administrator, follow these steps to re-enable External Forwarding: If you are a user of Office 365, please ask your IT Admin to adjust the setting and send him or her the URL of this web page. The affected mailbox, the mailbox with the forwarding rule set up, receives the error “ Your message wasn’t delivered because the recipient’s email provider rejected it.“ How to fix Remote Server returned ‘550 5.7.520 Access deniedĪn Office 365 administrator can adjust the default setting in the Office 365 environment, making it possible to forward mail externally again. This means that all mail that was previously neatly forwarded to an external email address is now suddenly blocked. However, since September 2020, a setting has been changed, whereby External Forwarding is disabled by default at the organization level. ![]() ![]() 3 A setting to rethink – Automatic Forwarding to external email addresses What causes this error Remote Server returned ‘550 5.7.520 Access denied’?īefore September 2020, Office 365 allowed emails to be automatically forwarded to external email addresses.
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