How to Fix Error 0x800CCC0E

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The error 0x800CCC0E is a Microsoft Outlook related issue that occurs primarily on Windows XP/Vista/7 operating systems. This error occurs when the Simple Mail Transfer Protocol (SMTP) server is unable to send or receive mail, while using one of the Microsoft Outlook programs. The error message, users may be presented with are as follows:

“The connection to the server has failed. Account: Server: Protocol: SMTP, Port: 25, Secure (SSL): No, Socket Error: 10051, Error Number: 0x800CCC0E.”

The host ‘’ could not be found. Please verify that you have entered server name correctly. Account: Server: Protocol: SMTP, Port: 25, Secure (SSL): No, Socket Error: 10051, Error Number: 0x800CCC0E.”

What Causes Error 0x800CCC0E?

This error is triggered by the inability of Microsoft Outlook, Windows Mail or Outlook Express to make a connection to the SMTP server, thus preventing it from receiving or sending mail.

How to Fix It

In the vast majority of cases, when individuals come face to face with this error, it’s usually the result of a fault with Microsoft Outlook.

However, there are those incidences when the error appears once and self-corrects, so that’s a possibility for you to consider. With that said, if it does persist, there are many things that the end user can do – all of which are outlined below.

Test Your Connection

The first thing you’ll want to determine is whether or not the error is due to your internet connection or Microsoft Outlook. In order for you to do this, you will need to ping the mail server. Doing this will help you determine whether you have access to the internet, and whether the mail server is online or offline. Anyway, to do this, simply to the following:

1. First, boot into your computer with administrative rights.

2. Then click on Start -> Run, type cmd and click on OK [Windows Vista/7: Start -> Type cmd (into the Search programs and files box) and Press CTRL + Shift + Enter, then click on Yes].

Start -> cmd

3. Once Command Prompt loads up, type ping followed by Enter.

Ping Mail Server

Note: Where represents your SMTP server.

If the computer pings the SMTP server successfully, it should report that packets were sent and received. If not, then it means the error is connection related – consider restarting your router.

Check Microsoft Outlook Settings

Depending on whether or not you have connection issues, you’ll want to check your email account settings. You should check the mail server names, to ensure that they are correct. Using a wrong port number is another main culprit for this error, so you’ll want to check that also.

For example, if you have encryption enabled but are using port number 143, which is a non-encryption port number, or if you haven’t enabled encryption, but are using a port number that supports encryption, such as 993, then you will receive this error message.

With that said to access these settings, simply do the following:

1. First, boot into your computer with full administrative rights.

2. Once in, double click on the Microsoft Outlook icon, to start the mail client software.

Start Microsoft Outlook

3. Once it has started, click on Tools -> Accounts.

Outlook -> Tools -> Accounts

4. This will bring up the Internet Accounts applet, from here, click on the Mail Tab, then double click on your Account.

Outlook -> Mail -> Account

5. This will bring up the Mail Properties applet, click on the Advanced Tab, then evaluate and make chances where necessary.

Mail Properties -> Advanced

Note: If you are using SSL, then use Port Numbers 995 and 465 for Incoming mail (POP3) and Outgoing mail (SMTP).

If you are not using SSL, then use Port Numbers 587 and 25 for Incoming mail (POP3) and Outgoing mail (SMTP).

Use Outlook PST Repair

There is that possibility that the error 0x800CCC0E is due to the corruption of your PST file. The PST file is used by Outlook to store all your data, such as the emails, contacts, password protected files and settings.

So you can see how integral this file is to the proper functionality of Outlook; and that’s where Outlook PST repair comes in to play. This tool was designed from the bottom up, to scan, repair and recovery this file, essentially repairing any errors that may have manifested from its corruption.

For more information on this tool, I suggest you visit the following:

Check Firewall Software

Do you have a firewall program running on your computer? If so, then you may want to consider disabling it, as it could possibly be blocking your mail client’s software from accessing the mail server.

To disable your firewall, simply right click on its icon, in the right hand corner of your screen and select Shutdown or Exit.

Alternatively, if you are using Windows built in firewall tool, and then I recommend you check out my post on using Windows Firewall, as I explain exactly how to disable that tool there.

Check Anti-virus Software

Are you using anti-virus software on your computer? If you are, which should be the case, then you may want to consider disabling it briefly, as the real-time scanning component, could be prohibiting Microsoft Outlook from making a connection to the mail client.

You should be able to disable your anti-virus software by right clicking on its icon in the bottom right hand corner and selecting Close or Exit.

The exact instructions will vary (depending on the anti-virus tool you’re using), so consider consorting the manual for instructions on how to properly utilise the tool.

Reinstall Microsoft Outlook

If after attempting all of the above methods, you are still having problems, then there is a strong possibility that Microsoft Outlook could be corrupt. In which case, you will want to reinstall it. To do this, simply follow the instructions below:

On Windows XP

1. First, boot into your computer with administrative rights.

2. Then click on Start -> Run, type appwiz.cpl and click on OK.

Start -> Run -> appwiz.cpl

3. Once Add or Remove Programs loads up, click on Add/Remove Windows Components.

Add/Remove Programs -> Add/Remove Windows Components

4. Windows Component Wizard should load up, from here scroll down and uncheck the box next to Outlook Express and click on Next.

Uncheck Outlook Express -> Next

5. Once it’s completed, click on Finish and restart your computer.

Finish Windows Components Wizard

Note: This will remove the Microsoft Outlook from your computer, so you will need to repeat steps 1 – 4, but this time, check the box next to Outlook Express to reinstall it.

On Windows Vista/7

1. First, boot into your computer with full administrative rights.

2. Start -> Type appwiz.cpl (into the Search programs and files box) and Press Enter.

Start -> Type Appwiz.cpl

3. When Uninstall or change a program loads up, click on Windows Live Essentials, and then click on Uninstall.

Windows Live Essentials -> Uninstall

4. Once you’ve removed Windows Live Mail, restart you system.

5. Lastly, download and install Windows Live Mail from here:

Run Registry Scan

Many computer errors are caused by a damaged and corrupted Windows registry; the result of repeated installing and uninstalling numerous programs. The Windows registry is essentially the heart of the operating system, thus making it a vital component for smooth system functionality.

Whenever a user installs an application, references are made to the program in the registry, these references are required by the application for it to function, however, when users decide to uninstall an application, occasionally, those references are not removed from the registry, which over time, can build up.

The only thing that you can do to prevent the build up of these broken and missing references in your registry, is to regularly run a full registry scan of your system.

However, in order for you to do this, you will need to use a registry cleaner tool. There are many of these tools around, but I personally recommend the use of SpeedyPC Pro, and that’s because of its multifaceted nature. Its ability to not only clean your registry, but also help in the maintenance of your system, makes it a sure winner. You can pick this tool up here:

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