Follow the steps below to configure Outlook Express to use SMTP authentication

1. From the top menu, click on “Tools,” Select “Accounts…”
2. Select the account which you want to configure and click “Properties”
3. Go to the “Servers” tab and look for Windows VPS info, check “My server requires authentication”
4. Click on the “Settings” button
5. In the “Outgoing Mail Server” dialogue box, click “Use same settings as my incoming mail server” radio button
6. 6.Click “OK” on all dialogue boxes

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