Easy Methods to Resolving Outlook Error 0x800ccc90

Summary: Outlook error 0x800ccc90 is due to POP3 account settings issues. This write-up helps you learn about the error and give you easy methods to fix them.

Content Table:

What is Outlook Error 0x800ccc90?

Outlook Error 0x800ccc90 is a standard error in Outlook 2007, 2010, 2013, 2016, and 2019. This error occurs if you configure multiple POP3 accounts in an Outlook account. You will get the error when you try to send or receive mail if you are experiencing this error.

What Causes Outlook Error 0x800ccc90?

There are many reasons for error 0x800ccc90 in Outlook apart from multiple pop3 accounts in a profile. Some of the other usual causes are,

  • Incorrect credentials.
  • Server authentication issues.
  • The port number changed.
  • Conflicting add-ins.
  • Corrupt Outlook data files.

Methods to Fix Outlook Error 0x800ccc90

If you face Outlook error 0x800ccc90, don’t worry. This article will help you repair the error. Below are some of the effortless methods to solve this problem. Please follow the steps carefully.

Method 1: Remove and Add Email Account

An easy way to fix error 0x800ccc90 in Outlook is to remove and add the email account again. You can follow the below steps to do this,

  • Open the Outlook application and click on the File tab.
  • Now select Account Settings and click on Account Settings in the list.
  • In the window, click on the Email tab, select the email account you want, then click the Remove button.
  • Click on Yes in the pop-up box and restart the Outlook application.
  • Go to the Account Settings window and click on the Email tab.
  • Now click on the New button and follow the on-screen instructions.
  • When done, restart the Outlook application.

Method 2: Create Send/Receive Group

The Outlook error 0x800ccc90 can be solved easily by separating the pop3 accounts into small groups. This makes the send/receive process more accessible and more effective. Follow the below steps to create groups,

  • Open the Outlook application and click on Send/Receive tab.
  • Now click Send/Receive Groups and select the Define Send/Receive Groups option.
  • In the window, click the New button, name the group, then click OK.
  • Now select the account on the left side of the window.
  • On the right side of the window, check the Include the selected account in this group box.
  • Then check the Send mail items and Receive mail items boxes.
  • Now select Download complete items, including attachments, and click OK.

Note: You can add more than one send/receive group and include more than one email in each group.

  • Once you complete creating groups click on the Close button.
  • When sending or receiving emails, click the Send/Receive tab and select the required group.

Method 3: Change Server Port Numbers

The other reason for the error is that the port number is changed to an incorrect one, or your ISP blocks it. You can fix this by changing the port number using the below steps,

  • Open the Outlook application and click on the File tab.
  • Now select Account Settings, then click on Account Settings in the list.
  • Select the Email tab, select the email account you need, and click Change.
  • Now click on More Settings.
  • Now click on the Advanced tab.
  • Now type 995 beside Incoming server (POP3) in the text box.
  • Now click on OK.

Method 4: Run Outlook in Safe Mode

Safe mode will load Outlook with default settings to let you troubleshoot this Outlook error. Follow the instructions to run Outlook in safe mode,

  • Press Windows + R keys to open the Run dialogue box.
  • Now type Outlook.exe /safe and press Enter.
  • Now choose the profile and click on OK.
  • Wait for Outlook to load.

Method 5: Disable Conflicting Add-Ins

Conflicting third-party add-ins can cause many issues in Outlook, including the 0x800ccc90 error. You can disable the add-in with the below instructions,

  • Open the Outlook application and click on the File tab.
  • Now click on Options and select the Add-in option.
  • Now choose COM Add-ins for Manage and click on Go.
  • You can uncheck the add-ins listed in the window.
  • You can also remove the add-ins,
    • Select the required add-in.
    • Now click on the Remove button.
  • Click on OK and restart Outlook.

Method 6: Repair Outlook Application

You can use a built-in repair tool to find and repair errors in Outlook. This tool will repair mistakes in any of the applications part of the Microsoft Office suite in your system. Below, you will find the steps to use the repair tool,

  • Open Settings from the Start menu.
  • Now click on the Apps tab in Settings.
  • Click on Installed Apps and search for Microsoft 365.
  • Now click on the three dots beside the Microsoft 365 – en-us and click on Modify.
  • Now select the repair option, click on Repair, and again click Repair to start the process.
  • Once the repair is completed, please restart the Outlook application.

Method 7: Repair Corrupted PST Files

The final repair solution for Outlook error 0x800ccc90 is to repair the corrupted PST file. A PST file corruption is one of the common reasons for the issues in Outlook. Below you can find two repair tool options that help you do this.

Steps to Use ScanPST Tool

ScanPST is a built-in repair tool by Microsoft. This will repair most of the issues in the Outlook PST file. You can find the scanpst.exe file below location,

  • Outlook 2019: C:\Program Files\Microsoft Office\root\Office16
  • Outlook 2016: C:\Program Files\Microsoft Office\root\Office16
  • Outlook 2013: C:\Program Files\Microsoft Office\Office15
  • Outlook 2010: C:\Program Files\Microsoft Office\Office14
  • Outlook 2007: C:\Program Files\Microsoft Office\Office12

Note: You replace the Program Files with Program Files (x86) for the 32-bit version of Outlook.

Follow the below instructions to use the ScanPST tool to repair corrupt PST files,

  • Go to the corresponding location of your Outlook version.
  • Double-click on the scanpst.exe file to open the tool.
  • In the tool, click the Browse button to open the corrupt PST file.
  • Now click on the Start button to begin scanning the file.
  • Click on the Repair button if errors are found after the scanning.
  • Open the Outlook application after the repair process is completed.

Note: ScanPST will take time to complete depending on the file size. You may also need to do multiple scans to achieve the best result.

Steps to Use SFWare PST Repair Tool

If you want, you can use a purpose-built PST repair tool to repair corrupt PST files. We recommend using the SFWare PST Repair tool, a user-friendly tool designed to handle many issues in Outlook data files – both PST and OST. You can follow the below steps to repair PST file corruption in Outlook,

  • Download and install the SFWare PST Repair tool in your system and launch it.

Free Download for Windows

  • On the main screen, click on the Open PST File option.

  • Now click on the Browse button to open the corrupt PST file, then click Next.

  • In the next window, select a scanning method, and give a location to save the repaired file.

  • Now click on the Repair button to start the scan and repair.
  • Once the process is completed, verify the result, and save the file.


Outlook error 0x800ccc90 is a standard error primarily due to adding multiple email accounts in an Outlook profile. You can find the other reason for the error and some easy methods to repair the error. If this blog is helpful for you to fix Outlook error 0x800ccc90, let us know below in the comments.

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