6 Quick Methods to Fix Outlook Error Code 0x800ccc0b

admin | Modified: 2020-09-08T14:36:20+05:30 | Email-Tips, How to, Outlook

Recently many Outlook users have been reporting sudden issues while sending or receiving any emails with their Outlook account. Their account simply stopped working, and suddenly an error message Outlook Error 0x800ccc0b appear on their screen. Due to this error, they are unable to receive or send emails.

If you are also facing the same problem then read the article to get the resolution of this sending reported error 0x800ccc0b in Outlook. But before we proceed, let’s understand this error code in detail along with its root causes.

What is Outlook Error 0x800ccc0b?

An unknown error has occurred error number 0x800ccc0b at the time of configuration. Generally, it arises when you enter the wrong SMTP (Simple Mail Transfer Protocol) server details. And also, if your access to Port 25 is being blocked by your Internet Service Provider, then the likelihood is that you will encounter error 0x800ccc0b Outlook and below versions.

Why this Sending Reported Error 0x800ccc0b Occurs?

Some of the major factors that are responsible for error 0x800cc0b Outlook are listed below:

  1. Incorrect configuration of the Outlook Email Client.
  2. Corrupt PST file.
  3. DNS server is having ISP issues.
  4. Improper installation of Outlook.
  5. Virus or Malware attack.

How to Fix Outlook Error 0x800ccc0b Manually?

Now know the possible causes of the Microsoft outlook error message 0x800ccc0b. Let’s see some manual workarounds to troubleshoot the issue:

1: Configure Email Server

First of all, restart your system. After that, configure your Outlook by using “SMTP: My server requires authentication” option. If this doesn’t work, then follow these steps:

  1. Open “File” and select “Account settings”
  2. Select “Email menu” and double click on the email address that is causing the problem.
  3. Click on “More Option” menu.
  4. Go to the Outgoing server button to submit your credentials.
  5. Next, choose “My Outgoing server requires authentication process” option.
  6. Now, follow the instructions carefully and enter your email account credentials.

Once completion of the process, check if the error is gone or not. If not then move to the next solution.

2: Use Port Number 26 For SMTP

The next method that you can try is by changing the port number for SMTP. As we have found that many Internet Service Providers (ISP) blocked the Port 25 to protect their clients from any cyber attack. Therefore, we suggest to choose Port 26 for SMTP.

Alternatively, you can also replace the number with 465 for SMTP on your port display section.
For POP3, replace the port number with 995. It is compatible with Windows 7 and all the above versions.

3: Disable Anti-Virus and Firewalls

As we all are familiar with lots of antivirus software, they protect our system from external virus attacks. But many of you don’t know that they can cause issues for other functions or programs. Hence, it is required to temporarily disable your antivirus and firewall software. By disabling them, you can check the Outlook operations of sending and receiving emails without any interruptions.

If it doesn’t work for you then you should opt-in for below quick measures.


  1. Open the Run Window by pressing the Windows and R keys.
  2. Type “sfc/scannow/command” in the provided space.
  3. Hit the enter key.

5: Delete Unnecessary Files

  1. Again open the Run program.
  2. Type “cleanmgr.exe” and hit the Enter key.
  3. Follow the prompts to commence disk cleaning process.
  4. Click on Mail >> Show Profiles >> Properties >> Data Files, enter the file name that you wish to scan, and press the Start button.
  5. Provided that you have done as said, ensure that your credentials (user account information) are correct.

Now, launch Microsoft Outlook and check whether the Outlook error 0x800ccc0b Windows is fixed or not.

If the issue is still persists then it means that your Outlook Personal folder file (PST) is highly corrupted. Read further to get an impeccable solution to repair those damaged data files.

Resolve Outlook Error 0x800ccc0b via Automated Software: An Expert’s Choice

Sometimes, this error 0x800ccc0b occurred due to a corrupted PST file, so to fix this issue you have to use an automated tool to repair corrupted PST files. Opt DataHelp Software as it highly proficient tool that is specially designed to repair file errors.

The utility has a quick and advanced scan mode to rebuild the severely corrupt PST data file. Moreover, the tool is capable to recover permanently deleted emails, attachments, calendars, events, etc.

Furthermore, the software is compatible with Windows 10 (32/64 bit) & all below versions.

Winding Things Up

Outlook error code 0x800ccc0b is one frequently getting errors that occur while sending or receiving the emails. This, in turn, will lead to several impacts on the Outlook PST file, if not resolved immediately.

So, in this article, we have mentioned some manual workarounds to resolve the error sending reported error 0x800ccc0b. However, if the issue still persists in their Outlook account then users can opt for the professional tool.