Accessibility Resource Center Skip to main content
Have a phone you love? Get up to $500 when you bring your phone.

Avoiding 550 5.7.1 Authentication Required on Outlook 2003

Copper Contributor
Copper Contributor
Posts: 8
Registered: ‎07-25-2012

Avoiding 550 5.7.1 Authentication Required on Outlook 2003

Message 1 of 1

After switching, apparently belatedly, from and for POP3 email to the new SSL settings ( ) on Outlook 2003, I was unable to send email, getting the error " 550 5.7.1 Authentication Required ."


By trial and error, I fixed this by going to "More Settings" in Outlook -> Outgoing Server tab, leaving "My outgoing server (SMTP) requires authentication" checked, and selecting "Use same settings as my incoming mail server." The error occurred when "Log on to incoming mail server before sending email" was selected.

How-To Videos
The following videos were produced by users like you!
Videos are subject to the Verizon Fios Community Terms of Service and User Guidelines and contains content that is not created by Verizon.
Have a spare Fios-G1100?Learn how to bridge it into your network
Get Started


Browse Categories

Verizon Troubleshooters
Unable to find your answer here? Try searching Verizon Troubleshooters for more options.
Modal Dialogue Title