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Step-by-Step Guide to Fixing the 0x800CCC0E Error in Outlook

The Outlook error 0x800CCC0E may occur due to various reasons. Understanding the possible causes behind this error is essential to troubleshoot and resolve it effectively. In this article, we will explore the reasons behind the error, methods to fix it, and discuss the advantages of using relevant utilities for a smoother Outlook experience.

Outlook error 0x800CCC0E is a common issue faced by users while working with the IMAP email client. Users get an error message "Outlook cannot synchronize subscribed folders for ***.com. Error: Cannot connect to the server. If you continue receiving this message, contact your server administrator or Internet Service Provider (ISP)" or "Outlook cannot download folder Inbox from the IMAP e-mail server for account ***.com. Error: Cannot connect to the server. If you continue receiving this message, contact your server administrator or Internet Service Provider (ISP)."

When does Outlook error 0x800ccc0e appear?

The error code 0x800ccc0e is an authorization error on the IMAP server. It typically arises when users are trying to access the folders from the IMAP email server. For example, when checking for new messages, downloading or synchronizing mailbox folders.

The reasons behind Outlook error 0x800CCC0E

There are several reasons that cause Outlook error code 0x800CCC0E, including:

  1. Disabled IMAP. Since the error is caused by authorization on the IMAP server, it is necessary to check if the IMAP is enabled for your email service.
  2. Incorrect email account settings. If your email account settings are not configured properly, such as incorrect port numbers or authentication settings, this error can occur.
  3. Connectivity issues. Error 0x800CCC0E may arise if there is a problem with your internet connection or the mail server is temporarily unavailable.
  4. Firewall or antivirus interference. Sometimes, firewall settings or antivirus programs can block the connection to the mail server, causing the error.
  5. Corrupt Outlook profile or data file. A damaged or corrupt Outlook profile or data file can also lead to the 0x800CCC0E error.
  6. Email stuck in the Outbox. Emails stuck in the Outbox may cause the Outlook error 0x800CCC0E.
  7. Oversized PST file. If your PST file exceeds the recommended size limit, it may cause the error.

How to fix 0x800CCC0E Outlook error

There are several 0x800CCC0E Outlook error solutions coming from the error causes. By following these detailed steps, you should be able to identify and resolve the cause of the Outlook error 0x800CCC0E.

  1. Check that IMAP is enabled. Sign in to the email client by using a browser. Go to the Settings section and enable IMAP. Turn on the Less Secure Apps setting.
  2. Verify IMAP settings in your email account. Double-check your email account settings to ensure they are correct and up to date:
    • Open Outlook and navigate to File > Info > Account Settings > Account Settings.
    • IMAPI account in Outlook
    • Select the email account experiencing the issue and click Change.
    • Verify the incoming server (IMAP) settings with your email service provider's documentation.
    • Ensure the correct port numbers and encryption methods are being used. For example, set the incoming server (IMAP) port to 143 if you don't have encryption enabled, or set the port number to 993 if you have encryption enabled.
  3. Check internet connection. Ensure that your internet connection is stable and working properly:
    • Restart your computer and modem/router to refresh your network connections.
    • Test your internet connection by opening a web browser and visiting a website.
    • Check if your email service provider's server is down by visiting their website or searching for outage reports online.
  4. Disable firewall or antivirus. Temporarily disable your firewall or antivirus software to see if it is interfering with the connection:
    • Temporarily disable your firewall by navigating to your firewall settings (usually found in the Control Panel or System Preferences).
    • Temporarily disable your antivirus software by right-clicking the antivirus icon in the system tray and selecting "Disable" or a similar option.
    • Once both are disabled, try using Outlook again to see if the error is resolved.
    • If the error is resolved, add Outlook as an exception in your firewall and antivirus settings to prevent future interference.
  5. Remove the problem IMAP account from Outlook and reconnect it using two-factor authentication:
    • Go to File > Account Settings > Account Settings.
    • Select the account you want to delete, then select Remove.
    • Re-start Outlook and go to the File > Add Account.
    • Use an app password, different from your regular email account password. To use it, set up 2-factor authentication for your account.
    The steps for setting up 2-factor authentication and obtaining an app password are different for each email provider. Check your provider's instructions.
  6. Create a new Outlook profile. If your current profile is corrupt, creating a new profile can resolve the error:
    • Close Outlook and open the Control Panel.
    • Click on Mail and then Show Profiles.
    • Outlook Mail Setup in Windows Control Panel
    • Click Add to create a new profile and follow the prompts to set up your email account.
    • Once the new profile is created, set it as the default profile by selecting Always use this profile and choosing the new profile from the drop-down menu.
    • Restart Outlook and see if the error is resolved.
  7. Delete or move the stuck email and restart Outlook. These actions can help resolve the problem and ensure successful email sending and receiving:
    • Open Outlook and navigate to the Outbox folder.
    • Locate any stuck emails and either delete them or move them to another folder.
    • Restart Outlook and try sending emails again to see if the error is resolved.
    To automatically unstuck the blocked messages, use ReliefJet Tweaks for Outlook. This simple add-in allows message unblocking in the default Outbox folder with a single click. And this is a free feature!
    ReliefJet Quick Tweaks for Outlook
  8. Resize Outlook data file. If your data file has reached its maximum size, the first thing you can do is to change the maximum file size limit. The free ReliefJet Tweaker for Outlook allows you to do this in just a few clicks. In the General Tweaks tab, simply set a new PST/OST file limit and click OK.
    ReliefJet Outlook Tweaker
    After you change the maximum Outlook data file size restriction, the 0x800ccc0e error may be resolved. However, you can use other special tools to maintain the optimal size of your mailbox and prevent the 0x800CCC0E Outlook error. The following add-ins can help you easily solve the problem of oversized Outlook data file or mailbox:
    • Split Outlook mailbox. This utility divides Outlook storage into smaller parts according to the user's criteria. Splitting the Outlook store reduces the risk of file corruption and error messages. The advanced version allows you to organize your mail and other items the way you like.
    • Remove Attachments. This tool removes unnecessary attachments from your messages, which can reduce the size of your data file and prevent oversized PST file issues.
    • Set Message Archiving Settings. This add-in helps you to customize the process of archiving messages, ensuring your mailbox remains organized and preventing issues related to oversized PST files or mailbox clutter.
    These automated instruments help you quickly resolve the errors caused by oversized PST data files, saving you time and effort. In addition, they help improve your overall Outlook experience and prevent future errors.
  9. Restore a PST file. Use the Backup Outlook and Export Outlook to PST utilities to create backup copies of your Outlook and Exchange folders. This way, you can easily restore a PST file, if it becomes corrupted, by importing it to your Outlook profile. Backing up PST files regularly can help prevent potential data loss and ensure a smooth recovery of a PST file.


Outlook error 0x800CCC0E occurs when users are unable to access the IMAP server for various reasons, including improper account and server settings, connectivity problems, interference from firewalls or antivirus programs, and Outlook data file issues. Understanding these causes is essential for effective 0x800CCC0E troubleshooting.

Using appropriate utilities can help address some indirect causes and significantly enhance the entire Outlook performance. To avoid Outlook errors in the future, use these automated tools regularly.

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