How to Fix the Outlook Error Code 0x800CCC0E?
The Outlook error 0x800ccc0e is an SMTP authentication error code that appears when a user tries to send or receive emails.
The reasons behind the 0x800ccc0e Outlook error could be many. In this article, we will discuss these reasons and the solutions that should help you troubleshoot and resolve the Outlook error 0x800ccc0e.

Causes of the Error Code 0x800ccc0e
- Issues with an Internet connection
- Authentication error
- Faulty or incompatible Add-ins
- Damaged Outlook program or files
- Wrong settings or port number
- Corrupt Outlook data file (.PST)
Methods to Fix Outlook Error Code 0x800ccc0e
Check Internet Connectivity and Firewall
A corrupt Internet connection could be a reason behind this error code. So, check your Internet connection and make sure that you have a stable connectivity.
Also, check your firewall settings and antivirus software. Some of the antivirus software comes with script blocking features, which will block the Outlook scripts and lead this Outlook error.
Disable the antivirus temporarily,
- Firstly, go to the “Windows Security” option.
- After that, go to Virus & threat protection, and select Manage Settings.
- Finally, switch Real-time protection to Off.
Disable the firewall temporarily,
- Firstly, open Settings tab.
- After that, select a network profile: Domain network, Private network, or Public network.
- Under Microsoft Defender Firewall, switch the setting to On.

- To turn it off, switch the setting to Off.
Check SMTP Server Settings
- Firstly, open Outlook and go to File > Tools > Account Settings.
- Secondly, click on the Email tab in the Account Settings window.
- In the Change Account window, click the “More Settings” button.
- In the “Internet Email Settings” window, click on the Outgoing Server tab.
- Finally, click the “My outgoing server (SMTP) required authentication” and then click OK.
Check the Port Number
- Firstly, open Outlook and navigate to File > Tools > Account Settings.
- Secondly, click on the Email tab in the Account Settings window.
- In the Change Account window, click the “More Settings” button.
- In the Internet Email Settings window, click on the Advanced tab.
- After that, change the Outgoing Server (SMTP): value with 587.
- Finally, click OK to apply changes and then restart Outlook
Repair or Reinstall MS Outlook