Server Error: '473 relaying prohibited. You should authenticate first.'

Have been unable to send emails from Outlook 2010. Have selected to use same server as incoming mail. How do I get out of this?

Question Info

Last updated February 28, 2019 Views 6,652 Applies to:
File tab, Account settings - double click on the account and change the server name. if the server is correct, click More settings and then Outgoing server tab - make sure you are using the correct authentication method.

Diane Poremsky [MVP - Outlook]
Outlook Tips
Outlook & Exchange Solutions Center
Subscribe to Exchange Messaging Outlook weekly newsletter orOutlook Daily Tips
Diane Poremsky [Outlook MVP]
Outlook Resources:

** I don't work for Microsoft, I just volunteer here.**

1 person was helped by this reply


Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.