Knowledgebase

How to fix the error ‘550 Relay Not Permitted’ in Microsoft Office Outlook

To enable SMTP authentication in Microsoft Office Outlook, the steps are:

Select the Tools -> Account Settings option.
On the Email tab, click the email account in question.
Select "More Settings ..." which is at the bottom right area of the pop up screen
Select Outgoing Server tab
Enable the option ‘My Outgoing server (SMTP) requires authentication’. Click OK.

Microsoft Outlook - Enable authentication

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