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How to Resolve the Outlook Error 0x800ccc0b When Sending Emails

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@yourdomain.com’, 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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