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Summary: Is the 0x800CCC90 Outlook error causing an interruption in your urgent work? Read along to discover all possible solutions to resolve it instantly and carry on with your work. Also, you must utilize the Kernel for Outlook PST Repair software to keep corruption a mile away from your precious PST files.

Outlook has grown substantially to become every individual’s go-to personal information management platform, with over 400 million users globally. Users often make the most of it to manage their emails, contacts, tasks, and calendar appointments.

However, users tend to experience many Outlook errors, and one of the most common is Outlook error 0x800CCC90. You may encounter this error while sending or receiving emails, and the primary reason is the configuration of multiple POP3 accounts in your user profile. To avoid any further delay in work, you must immediately resolve it, and this article will guide you through the 7 quick methods to fix the 0x800CCC90 Outlook error when receiving emails on Windows.

What Causes The 0x800CCC90 Outlook Error?

There are no specific reasons which indeed cause this issue. But these are all the possible causes-

  • The number of POP3 connections exceeds the limit set by ISP
  • Incorrect port number for Outgoing server
  • Inaccurate username and password
  • Port blocked by Internet Service Provider (ISP)
  • Conflicts due to external applications
  • Inclusion of problematic add-ins
  • Severe Outlook PST corruption
  • Using an outdated Outlook version
How To Fix 0x800CCC90 Outlook Error When Receiving Emails on Windows?

These are all the 7 solutions that will help you to resolve the 0x800CCC90 Outlook error when receiving emails on Windows-

A. Creating a New Send/Receive Group:

Since having multiple POP3 accounts is the prime reason behind this error, you can divide these accounts and create smaller Send and Receive groups.

  1. Launch Outlook and tap on the Send/Receive tab from the toolbar.
  2. Click on Send/Receive Groups. From the dropdown list, select the Define Send/Receive Groups optionSend and Receive Groups
  3. In the Send/Receive Groups window, click on on New
  4. Enter a suitable Send/Receive Group Name and click on on OK
  5. Under the Accounts section on the left, choose an account.
  6. At the top, check the box beside Include the selected account in this group option. Similarly, check the Send mail items and Receive mail items under Account Options.Receive mail items under Account Options
  7. Click on the Down complete item including attachments option. Finally, select OK.
  8. You can keep on creating more groups. To send and receive emails from this newly created group. Go to Send/Receive tab and select the group in the Send/Receive Groups dropdown options.
B. Change the Server Port

Your Internet Service Provider may have blocked the server port you are reaching out to, resulting in this error. You can simply change the port number of your server.

  1. Launch Outlook and select the File tab.
  2. Select Account Settings under the same option.Account Settings
  3. Under the Email tab, select Change
  4. In the Change E-mail Account window, click on More Settings.
  5. Move to the Advanced tab and enter 995 beside the Incoming Server (POP3). Click on OK to save changes.
C. Open Outlook in Safe Mode

The Safe Mode in Outlook launches the program in a diagnostic state, making identifying problematic add-ins easier.

  1. Click the Windows + R keys to open the Run command.
  2. In the box, type “Outlook.exe/safe” and select OK
  3. If a confirmation prompt appears, click on OK.
D. Remove Problematic Add-ins

If Outlook is working perfectly fine in Safe Mode and the error 0x800CCC90 no longer exists, then it is clear that an add-in is causing the error, and you must remove it at once.

  1. Navigate to the Files tab.
  2. Click on Options and move to the Add-ins section.
  3. Click on the Go button at the bottom on the Go button
  4. Uncheck the box beside the add-in you want to remove and click OK
E. Remove & Add the Profile Again

If a temporary bug is behind this issue, you can quickly remove the Outlook account and add it again. This will clear the problem and allow you to start from scratch.

  1. Click on the File tab and select Account Settings. Again, tap on Account Settings from the dropdown options.
  2. Under the Email tab, select your account and click on Remove.Click Remove
  3. Click on OK to confirm the action.
  4. To add the same account, open Account Settings and select New under the Email new
  5. Enter all the required details and configure the account.
F. Repair MS Outlook

You can utilize the in-built repair facility to repair any Microsoft program, including Outlook. Ensure to close all platforms before running this repair process.

  1. Open Control Panel in your system and select Programs.
  2. Click on Programs and Features and locate Microsoft Office from the entire list.
  3. Select Microsoft 365 Apps, right-click on it, and select change
  4. Here, select Quick Repair and click on the Repair on the Repair
  5. Once the repair process is complete, restart your system.
G. Repair Corrupted PST File

A corrupted, damaged, or inaccessible PST file can cause more trouble than you can estimate. Depending on the level of corruption, you can choose the appropriate method.

  1. Use the Inbox Repair tool for minor corruption in PST-
    The Inbox Repair tool (SanPST.exe) is a utility provided by Outlook to repair errors in its data files. You can locate ScanPST in different versions of Windows and begin the process. This tool is suitable for handling minor corruption in your PST files.
  2. Use a professional tool for severe corruption in PST-
    Whether it is a large or heavily damaged PST, the Kernel for Outlook PST Repair is the right tool to rely on. This automated software offers the simplest interface to repair innumerable PSTs without worrying about their size or data integrity.


The 0x800CCC90 Outlook error is becoming one of the most common Microsoft Outlook issues among users. The primary reason behind it is the configuration of several POP3 accounts in your profile, especially when it exceeds the limit set by your ISP. Some other factors also contribute to it. However, it can be efficiently dealt with using the 7 quick methods to fix the 0x800CCC90 Outlook error when receiving emails on Windows, which have been discussed at length above.

Kernel for Outlook PST Repair
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