How to Fix 0x800CCC0F Error in Outlook?

“I have issues connecting to my work emails using Outlook 365. The send/receive error keeps showing error 0x800ccc0f & 0x800ccc1a.

Emails are delayed in receiving when the error occurs. But emails will load in when it can connect to the server without error.

Can anyone help me with this?”

Queries like these are common on the Microsoft forum where users report facing the 0x800CCC0F error in Outlook. Usually faced when sending or receiving SMTP based emails, this error causes delay and interrupts the workflow of users. To help you fix 0x800CCC0F error in Outlook, we’ve given some simple easy methods.

What is 0x800CCC0F error in Outlook?

‘The connection to server was interrupted’ error, otherwise known as the 0x800CCC0F error occurs when your Outlook cannot connect to the email server. When users try to send or receive SMTP based emails, they might see the following message:

Sending / Receiving reported error (0x800CCC0F): The connection to the server was interrupted. If the problem continues, contact your server administrator or Internet service provider (ISP).

This puts a complete stop to the workflow of users and impacts the productivity negatively.

Key causes of 0x800CCC0f error in Outlook

Knowing the potential reasons behind this error helps in resolving it quickly and effectively. Following are the most common reasons why users might face this error:

• Antivirus or firewall settings: It is possible that your PC’s antivirus or firewall might be blocking the incoming and outgoing of emails in Outlook.
• Incorrect profile settings: If your Outlook profile isn’t configured properly then it can give rise to such issues.
• Oversized mailbox: An oversized mailbox can negatively impact the performance of your email client.
• Unstable network: One of the most common causes of this error arising in Outlook is unstable network connection.
• Virus/malware attack: Cyberthreats like virus/malware can lead to inability to access Outlook profile and might face such an error. In worst case scenarios, it may even lead to corruption in data files.

Simple ways to fix 0x800CCC0F error in Outlook

Depending upon the reason behind the occurrence of this error in Outlook, users can perform the given fixes to try and resolve this error. These methods are simple to perform and may fix your issue promptly.

Note: Before attempting to perform these methods, check that you’ve uninterrupted network connection. Also, delete all the junk emails from your Outlook mailbox to free up space and improve the performance.

Method 1. Disable antivirus and firewall

Antivirus and firewall might block the incoming and outgoing of your Outlook emails and give rise to the send/receive error. Try to disable your system’s antivirus and firewall temporarily to check if it resolves the issue. Follow the steps below to do so:

·       Open your system’s Control Panel and click on Network and Sharing Center.

·        In the bottom left corner, click on Windows Firewall.

In the Windows Firewall window, click on the Turn Windows Firewall on or off option.

·      Finally, select the Turn off Windows Firewall under the Public Settings section and click OK.

Method 2. Increase the Server Timeout limit of Outlook

Server Timeout settings define the maximum time limit Outlook will wait for a response from the email server before time out. A low timeout limit leads to connection and sync issues. Follow the steps to increase server timeout limit:

• Open Outlook and then go to File.
• Go to Account Settings > Account Settings.
• Choose your email id and click on the Change button.
• Now, click on More Settings and go to the Advanced tab.
• Move the Server Timeout slider as per your need and click OK.

Method 3. Verify Outlook profile settings

Verify that correct incoming and outgoing server settings are entered in your Outlook profile. The correct settings for incoming and outgoing server are:

Incoming Mail Server (IMAP):

Server	imap-mail.outlook.com
Port	993
Encryption	SSL/TLS

Outgoing Mail Server (SMTP):

Server	smtp-mail.outlook.com
Port	587
Encryption	SSL/TLS

Method 4. Check Router’s MTU settings

This method is for users who have knowledge about Routers and their settings. Maximum Transmission Unit (MTU) is the largest amount of data packet that can be transferred across a data link. Usually, the standard limit is 1500 bytes but if you’re facing issues then try making changes as per your requirements.

Method 5. Launch Outlook in Safe mode

Try to launch your Outlook application in Safe mode to see if this resolves the 0x800CCC0f error. In Safe mode, Outlook starts without any add-ins and minimal features to check if the issue is caused by any add-ins or features. Follow the steps below to launch Outlook in safe mode:

Close all the instances of Outlook running in the background.

Press Win + R on your keyboard and type outlook.exe /safe in the dialogue box.

Click OK and wait for Outlook to launch in Safe mode.

Method 6. Use ScanOST tool

If by now no method has worked for you then there’s a big possibility that your OST file has gone corrupt. To repair your OST files for free, Microsoft has a built-in utility called ScanOST tool. You can easily locate ScanOST in Outlook and repair your corrupt OST files.

Limitations of Manual Methods

These methods described above may fix minor issues in your OST files. However, serious issues like severe corruption can’t be addressed with these methods. Moreover, disabling your system’s firewall can expose your device to several cyberthreats. Also, altering the settings of your Outlook profile or the internet router can give rise to irreversible errors.

Alternative method to fix 0x800CCC0F error in Outlook

It’s wise to steer clear of the manual methods if you wish to resolve the 0x800CCC0F error quickly. The best possible approach to fix this error is to use a reliable OST to PST converter. This OST to PST converter easily recovers data from corrupt or inaccessible OST files with the original file integrity. You can save the recovered data in formats like PST, MSG, EML, PDF, etc. and save them at the location of your choice. Additionally, you can migrate all your data from OST files to Office 365, Hosted Exchange and other different platforms.

Conclusion

We have given a detailed overview of the 0x800CCC0f error in Outlook and the reasons that may give rise to it. Also, we have given methods that you may perform to resolve the 0x800CCC0f error in Outlook. However, if you find that your OST file is severely corrupt, then we have also mentioned a trusted OST Recovery Tool to simplify the recovery process.

Q. What is the 0x800CCC0f error in Outlook?

A. If you’re unable to send or receive any emails in Outlook, you might be facing the ‘The connection to server was interrupted’ error. This happens when Outlook cannot establish a connection with the email server.

Q. How to fix 0x800CCC0f error in Outlook?

A. Some simple fixes to resolve the 0x800CCC0f error include:

• Disabling Firewall and Antivirus temporarily.
• Reconfiguring Outlook profile settings.
• Using ScanOST tool.
• Using a OST to PST converter.