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How to Resolve the Outlook Error 0x800ccc0b When Sending Emails

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If you encounter the 0x800ccc0b error when sending an email, the first step is to verify the server configuration information in MS-Outlook. This error typically prevents users from sending emails due to incorrect SMTP server details.

Error Message: An unknown error has occurred. Account: ’[email protected]’, Server: ‘mail.yourdomain.com’, Protocol: SMTP, Port: 25, Secure (SSL): No, Error Number: 0x800CCC0B

Here’s a simple solution to fix the send/receive Outlook error 0x800ccc0b:

  1. Click on “Account Settings” under the “Tools” menu.
    Image 1
  2. In the new account settings window, click on the “Email” and double-click on the email address through which you are unable to send emails.
    Image 2
  3. In the pop-up window that appears after the double-click, click on the “More Settings” button.
    Image 3
  4. Go to the Outgoing Server tab and select the “My outgoing server (SMTP) requires authentication” checkbox.
    Image 4 Ensure that “My outgoing server (SMTP) requires authentication” is checked.

For additional help, you can download Microsoft Outlook 2016 here.

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