Most Strategic Ways to Fix Outlook Express Error Code 800ccc03

Written By Ashwani Tiwari
Anuraag Singh
Approved By Anuraag Singh
Published On June 28th, 2019
Reading Time 5 Minutes Reading

“We have made a fresh installation of Zimbra multi-server environment in our organization consisting of 2 servers:
1. ZCS = Network Edition v5.0.13
2. OS = Ubuntu Server Edition 8.04.2 64-bit
All of them are running fine in their default settings but the main problem is with Outlook Express and Outlook. It is so because Outlook Express is continuously throwing an error whenever we’re trying to access its mailbox. The description of the error message we’re getting is as following:
An unknown error has occurred.
Account: (server’s ip address)
Server: (server’s ip address)
User name: (username)
Protocol: IMAP
Port: 143
Secure(SSL): 0
Code: 800ccc03
What we are lacking here and why Outlook Express Error Code 800ccc03? Please suggest any appropriate solution to fix this.”

As we all know Outlook Express is a handy email client developed by Microsoft and it comes for free with Windows. Since it is a light version of Outlook so it has some shortcomings too such as a complete absence of repairing tools. Due to this sometimes Outlook Express application gets crashed and prompts an error code like Runtime Error 800CCC03. Well, it is very common and can happen with anyone even with Outlook Express experts. So, in this article, we’re going to discuss about Outlook Express error code 800ccc03 along with its reasons and some simple techniques that will help users to fix all the common errors related to Outlook Express.

Outlook Express Error 800CCC03: Description

Error name: Outlook Express Error Code 800Ccc03
Error number: 800CCC03
Message: Error 800CCC03: Microsoft Outlook Express has encountered an issue and needs to be closed. We’re sorry for the inconvenience.
Application: Microsoft Outlook Express
Developer: Microsoft

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Outlook Express Error 800CCC03: A Brief Introduction

Outlook Express Runtime Error 800CCC03 basically occurs when Outlook Express application stops responding or gets crashed while running. After error prompt, the application stops working and hangs an annoying alert message on the computer screen until it gets resolved properly. The Outlook Express error 800CCC03 mostly occurs while installing, starting or closing the program in Windows OS. Incomplete installation of the program, corrupted registry files, virus infection, poor Internet connection etc., are some common causes that result in error Outlook Express Runtime Error 800CCC03.

Outlook Express Runtime Error 800CCC03

Methods to Fix Outlook Express Error Code 800ccc03

Method 1. Repair Corrupt Registry Entries

Alert—This method comprises high risk of damaging your system and we do not claim any accountability for the results after implementing the following steps.

In order to repair Windows Registry manually first, you have to backup the registry associated with Outlook Express runtime error 800CCC03. Follow the steps below:

  • Hit the Start button and type command. Hold Ctrl+Shift keys and hit Enter
  • This will show you a permission dialog box. Click Yes
  • Type regeit and press Enter. In Registry Editor, choose Outlook Express error 800CCC03 related key you want to backup
  • Click on File >> Export and in Save In list, choose a name for backup file like ‘Outlook Express Backup’
  • Now, in Export Range wizard, choose Selected branch and click Save
  • File will save as .reg and you have a backup of Outlook Express associated registry entry and repair registry files.

Method 2. Uninstall and Install Outlook Express

Outlook Express Error Code 800ccc03 can be resolved after a fresh installation of the application. To do so, follow the steps below:

  • Click on Start menu and open Programs and Features
  • Open Control Panel and click on Add or Remove Programs
  • Select Outlook Express from the list of Currently Installed Programs
    Click on Remove

After successful removal/ uninstallation, install Outlook Express once again and you’ll find Runtime Error Code 800Ccc03 of Outlook Express gets resolved.

Method 3. Use Most Powerful Automated Solution

Since Outlook Express is no longer supported by Microsoft so, migrating from Outlook Express to another better email clients is one of the best options. DBX to PST Converter is a reliable program that can resolve Outlook Express error 800CCC03 in a few simple clicks even without any hassle. Using this, one can convert their Outlook Express DBX files into PST, EML, MBOX, and MSG file formats. After successful file conversion, users can access their Outlook Express database from various other emailing platforms like Mozilla Thunderbird, Microsoft Outlook etc. The software can be installed and operated in Windows 10 and all below version of Windows OS (both 32/ 64-Bit).

Summing It Up

Outlook Express is a widely used email client that prompts some strange and annoying errors sometimes. In this technical blog, we’ve talked about one such error i.e., Outlook Express runtime error 800CCC03. All the possible reasons that might cause this issue are described in this article along with some simple manual solutions. In case if someone finds manual solutions tricky or risky then, an expert solution is also recommended here to resolve Outlook Express error 800CCC03.

Frequently Asked Questions

Why does Microsoft Outlook Keep crashing?

Incomplete installation of any program in local computer, presence of corrupted registry files, virus infection and slow Internet connection etc., are some most common reasons due to which Outlook Express keeps crashing.

Can I use Outlook Express with Exchange Server?

If you want to use Outlook Express with Exchange Server then, you need Exchange Server Client Access License (CAL) and set POP3 as the default protocol.

Is it possible to use Outlook Express with Gmail?

Yes, Outlook Express allows to configure various emailing accounts with it. To use Outlook Express with Gmail, open OE and click on Tools >> Accounts >> Add Mail and enter Gmail account address and select POP3 and IMAP protocols.

Why is my Outlook Express not sending emails?

If you are facing issues with Outlook Express while sending emails then, the problem might exist in Outgoing Mail (SMTP) Server. So, make sure you have entered the correct server name in Outgoing Mail (SMTP) section.


By Ashwani Tiwari

Being a Chief Technical Analyst, I am aware of the technicalities faced by the user while working with multiple technologies. So, through my blogs and articles, I love to help all the users who face various challenges while dealing with technology.