How to resolve Windows Live Mail error 0x800CCC6F

  • You may get stuck sending emails in Outlook Express and get a server error 554.
  • This Outlook 554 error occurs when you try to send a large number of emails to the same recipient or different users.
  • Common causes include failed installation or removal of software that may have left invalid entries in the Windows registry.
  • In most documented cases 0x800CCC6 error is due to an unsupported port on the SMTP server or the SSL option for SMTP.

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When you try to send lots of emails to multiple recipients or different users in Outlook Express, you may get the Outlook 554 error. Here is how to fix Outlook server error 554.

Error 0X800Ccc6F is also known as a “runtime error” or software bug when it occurs in Live Mail. In order to eliminate these bugs as quickly as possible, engineers can use various tools when developing software like Windows Live Mail. The software developers may not have discovered errors such as error 0x800CCC6F during this phase, as much as they try to prevent them.

A screen error message may appear:

Error 554: The server was down
554 Error on sending the message: there may have been misuse of this email account; you can find more information at http://postmaster.yahoo.com/abuse_smtp.html.
The server is ‘mail.btinternet.com’.
It is an error with ID 0x800CCC6F with Windows Live Mail
Protocol: SMTP
Port: 25
There is no secure connection (SSL)

This is because your ISP does not allow unsolicited mail to be sent and may temporarily block you if you attempt to do so.

It is usually caused by failures or crashes when Windows Live Mail runs, which is why it is called Runtime Code 554 0x800CCC6F. Symptoms, causes, and how to troubleshoot this error are below. It does not necessarily mean that the code was corrupt, but rather that it failed to run during its run-time. If this error is not handled and corrected, it will appear on your screen as an annoying notification.

An error name like Windows Live Mail Server Error 554 0x800ccc6f contains a lot of information about the error, including what caused it, what system component or application failed and so on. Manufacturers of defective components or applications can decipher the numeric code contained in the error name to find out what caused the error.

It has been documented that the 0x800CCC6F error often occurs because SMTP servers are not equipped with ports that are supported by SMTP servers or because SSL is enabled on SMTP servers. You should be able to resolve the problem if this is the case by changing your mail server settings to a port that is supported by your POP connection if this is the case.

Click here for instructions on how to back up your files before you restore Windows Live Mail to see if that solves the problem. Try repairing Windows Live Mail to see if that fixes the problem.

Without specialised technical knowledge or appropriate software, it is still difficult to find and fix the cause of an error with this code, even when it occurs at many points in the system.

What causes Windows Live Mail error 0x800CCC6F

What causes Windows Live Mail error 0x800CCC6F

The error indicates that your system is malfunctioning if you encounter it on your computer. The effects of a virus or malware attack may leave invalid entries in the Windows registry if the application was not installed correctly or removed correctly, the effect of an improper shutdown resulting from a power outage or another factor, a person with limited technical knowledge accidentally deleting a system file or registry entry, and many other causes.

Having an incorrectly executed operation by a system component or application is the immediate cause of “Windows Live Mail Server Error 554 0x800ccc6f.”.

  • Virus: If your computer has recently been hit by a virus or malware, and you have cleaned it with a reliable anti-virus program, there may still be some damage. This damage can cause many problems, including Outlook Error 554 or 0x800CCC6F. A good computer tuner, such as Advanced System Repair Tool, can help you a lot in this situation.
  • Missing system components: Missing system files such as dll, exe, sys, inf, ocx, etc. may be deleted, damaged, or corrupted. In this situation, you will need an advanced system repair tool to solve this problem. This tool simply scans your entire PC and fixes all errors with one click.
  • Corrupted Office installation: Your Office installation may be damaged or broken. In this situation, MS Office repair can be a simple solution.
  • Limited server resources: Each server has limited resources. This can limit the maximum number of recipients you can send email to at one time. If you exceed the maximum number, your server may mark your IP as spam.

To fix Windows Live Mail error 0x800CCC6F



Updated: February 2024

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To fix Windows Live Mail error 0x800CCC6F

Use correct POP settings

This error can usually be fixed by changing the mail server settings to a POP port supported by the server that is experiencing 0x800CCC6F. If the SMTP server does not support port 80 or SSL, then you will have to change the port settings to 80.

Changing the port setting might not fix the problem. However, you may also want to change the access provider for outgoing SMTP mail. If you have trouble changing mail server settings, follow these instructions:

  1. You should be logged into the mailbox that caused the error 0x800CCC6F when you open Windows Live Mail.
  2. You can then navigate to Settings – Mail Accounts (on the top ribbon bar).
  3. Click Properties in the right pane after selecting the problem account in Accounts.
  4. If your mail company provides an alternative SMTP setting, change it to that value in the Servers tab of the Properties window. Next, select the My server requires authentication checkbox and click Options.
  5. Click OK to save your changes once you’ve selected the Use the same settings as my incoming mail server checkbox on the outgoing mail server.
  6. Changing the outgoing mail server (SMTP) port in the main properties window is done by selecting the Advanced tab.

Whitelist the SMTP port or remove the third-party firewall

A firewall overprotected by a firewall can interfere with the email provider’s port, another common cause of error 0x800CCC6F. As a matter of fact, the Windows firewall does not report this behavior – it has always been known to let mail ports through without any problems (unless it is explicitly configured to block them).

Windows Live Mail 0x800ccc0f

You must repair the PST files if you want to eliminate the error message caused by 0x800ccc0f. This error appears mainly when PST files are corrupt or damaged. In order to repair PST files, follow the path: C:/Documents/Settings/%Username%/LocalSettings/ApplicationData/Microsoft/Outlook/Outlook.pst. You can remove the files with a third-party tool or select them.

It has been known, however, that some third-party antivirus sites can block some of them if they detect suspicious activity. This may also apply to TLDs. The most elegant solution if this situation applies is to allow your email account’s SMTP port in the firewall settings.

However, you will need to take different steps depending on your third-party security package. You can only whitelist that port if you cannot (or don’t want to) and don’t want to. If you do that, follow these instructions: If you decide to remove the security package completely, you must do the following:

  1. Click the Run button on the Windows Start menu to open the Programs and Features dialog box. Then type “appwiz.CPL” and hit Enter.
  2. Choose your firewall from the list of programs in the “Programs and Features” window and click Uninstall.
  3. Upon reaching the uninstallation screen, follow the instructions.
  4. You can try sending email again after restarting your computer after removing the third-party firewall.

Clear the “Outbox” folder in Windows Live Mail

There may have been some delivery problems with your last attempt to send an email, as indicated by the error message 0x800CCC6F.

Windows Live Mail can continue to send the error message until you clear the queue in your outbox if you have an old email that cannot be sent.

In Windows Live Mail, follow these instructions if this script applies:

  1. Then, click Work offline under Tools on the top ribbon bar of Windows Live Mail.
  2. Select Compact View from the View tab once offline mode has been enabled.
  3. On the top left side of the Folder List (Compact view), click the email icon.
  4. The Outbox folder can then be opened by clicking the Outbox item in the items list.
  5. To delete a blocked message, right-click it and select Delete from the new pop-up menu.
  6. The problem may be resolved by restarting Windows Live Mail.

Turning off your router/modem

  1. Turn off the router by pressing the power button on the back, and unplug the power cord, allowing the power capacitors to drain completely for at least 30 seconds.
  2. Wait for Internet access to return after replugging the network device, turning it off, and turning it back on.
  3. See if the problem is resolved by repeating the action that caused error 0x800CCC6F.



RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

  1. Change your ports.
  2. Temporarily disable your third-party antivirus solution.
  3. Scan your computer for malware.
  4. Uninstall and reinstall Windows Live Mail
  5. Troubleshoot network issues
  6. Reinstall network adapter driver
  7. Update the network adapter driver
  8. Try using Windows Live Mail with a different Windows account.

Go to Windows Live Mail and open the Accounts tab -> Properties -> Advanced... Enter 465 in the "Inbox" field and make sure the box is checked. 465 is the default SMTP port for secure, authenticated outgoing mail. No mail server will deliver incoming mail through port 465.

  1. Click the Start button (the circular button with the Windows logo on it).
  2. Click Control Panel.
  3. Click on Programs.
  4. Click Programs and Features.
  5. Find Windows Live Essentials and double-click it.
  6. Click Restore all Windows Live programs.

  1. Open the Windows Live Mail program.
  2. Select the Home tab in the upper-right corner of Windows Live Mail.
  3. Click the Outbox button on the left side of the page. Find the emails that are not being sent.
  4. After you resend the email, you can delete it in your Outbox. The error will disappear after you delete the sent message.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog, techquack.com, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.