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What would you do if you see you cannot send or receive an email on Outlook? Well, if you are a frequent user of Outlook and facing this situation repeatedly, work can be rather challenging for you. However, if you are facing such issues, do not worry. 

Outlook error 0x800ccc67 is one such error due to which you can face issues with sending or receiving emails and it normally occurs due to several reasons. It may be generated due to Outbound SMTP server connection issues. As, many times, a connection can not get established because of a wrong Outlook setting. 

Sometimes many internet providers make these changes without notifying the user. Another reason for it can be, emails getting blocked due to the installed anti-virus and Firewall programs.

In this article, we are going to discuss Outlook error 0x800ccc67, its signs, causes as well as steps to resolve it.

Microsoft Windows Operating Systems in Which this Error can Occur

These errors are rather common and occur in almost all operating system of Windows. Here, we have listed the ones in which it is quite frequent.

1.Windows 10

2.Windows 8

3.Windows 7

4.Windows Vista

5.Windows XP

6.Windows ME

7.Windows 2000

Signs of Outlook Error 0x800ccc67

If Outlook error 0x800ccc67 has occurred, you may face some of these symptoms on using your personal computer. 

  • Error 0x800ccc67 occurs and crashes the active program windows.
  • You may face frequent PC crashes on running the same program.  
  • “SMTP_421_NOT_AVAILABLE” is displayed on your desktop screen
  • Windows run relatively slower and respond pretty slow to keyboard and mouse inputs as well.
  • Your Pc freezes periodically in between while using the desktop.

Causes of Outlook Error 0x800ccc67

Outlook error 0x800ccc67 can occur due to numerous reasons. Here, we have listed some of the possible causes of this error.

  • The first cause of this error may be a corruption during the downloading process or incomplete installation of Microsoft Outlook Software.
  • Another very common cause of this error is corruption in Windows registry from any recent change in Microsoft related software.
  • It can also be a result of any malware or virus within the Windows system files or programs related to Microsoft Outlook.

Methods to Fix Outlook Error 0x800ccc67 

There are several troubleshooting steps that can be helpful for you to resolve this error and the difficulties related to it. Therefore, follow these methods one by one to avoid any unnecessary consumption of time and effort.

Solution 1: Conduct a Full Malware Scan

First of all, it is better to conduct a malware scan, as sometimes the cause of the Outlook errors can be due to any virus or corrupted file. Thus, an immediate malware scan might be helpful for you to get rid of it.

Solution 2: Get Rid of Junk Files

Clear out all the junk temporary files as well as folders with the help of Disk Cleanup from your desktop. This will clear out all the junk files and you can start afresh. Sometimes, the cause of these errors can be due to junk files as well. 

To do this, follow the steps below:

  • First of all, close any applications that are open.
  • Go to Start.
  • Then, select Computer.
  • Right-click on the system drive.
  • Now, select Properties.
  • Click Disk cleanup on the General Tab.
  • Go to Delete list and choose Temporary files.
  • Click Ok.
  • After this, close the system drive Properties dialog box.

Solution 3: Uninstall and Reinstall Microsoft Outlook Program:

Uninstall as well as reinstall the Microsoft Outlook Program that is related to the error 0x800ccc67. This is an easy way to get rid of issues, as sometimes an error may occur if the application is not properly installed.

To perform the above task, follow these steps:

  • Go to Start.
  • Choose the settings option to start Windows settings.
  • Now, choose Apps from Windows Settings.
  • After this, select the Microsoft Office Desktop App option.
  • Lastly, select Uninstall.
  • To reinstall, you can do that easily from the Office suite in the Windows App store.

Solution 4: Update Windows to the Latest Version

Another way to get rid of this issue is by installing all the Windows update that is available. You may face error if the Windows is not updated to its latest version. Thus, update it and see whether it resolves the error.

Here is how you can update your Windows OS:

  • Go to Start
  • Then, select Settings
  • Now, choose Update & Security 
  • Select Windows Update
  • Choose “Check for Updates” to see whether there are any new updates available.
  • Press Install.


Errors associated with Outlook are pretty common and can affect your work as well. Thus, if you are facing such error as error code 0x800ccc67, follow the steps stated above. 

If the problem still persists and you cannot find any solution, consult a professional who is well recognized in this sector. Let us know in the comments below, whether this article resolved your issue.

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