When using You should understand these email error messages (codes) and their possible origins to troubleshoot and rectify issues efficiently.
TABLE OF CONTENTS
What Are Email Error Messages in Outlook Express
There are a variety of email error messages in Outlook Express, these are listed below to help you ascertain what to do to rectify the one that you may have encountered.

Internet Connectivity Issues
Ensure your device is connected to the Internet or a local network. A lack of connectivity can lead to email error messages when you try to access your email.
Incorrect Email Account Settings
Verify that your email account settings in Outlook Express or Outlook are configured correctly. Incorrect email account settings can prevent successful connections to the email server.
Damaged User Account Profile
A corrupted user profile in Outlook Express or Outlook can hinder email functionality. Consider creating a new profile if you suspect this may be the issue.
Corrupted Email Items on the Server
Sometimes, specific email items stored on the POP3 server can become damaged or corrupted, leading to connection errors.
Antivirus Software Configuration
Incorrectly configured antivirus software can block Outlook Express or Outlook from connecting to the email server. Ensure your antivirus settings allow for email communication.
Installation Issues
If Microsoft Outlook or Outlook Express has been uninstalled improperly or if the installation is damaged, it may result in connection errors. Reinstalling the software may resolve these issues.
Personal Firewall Settings
Like antivirus software, personal firewall configurations can also block necessary connections. Check your firewall settings to ensure they permit access to Outlook and Outlook Express.
Email Error Message Codes
Users may encounter the following error codes when facing connection issues with Microsoft Outlook or Outlook Express:
0x800ccc15: Unable to connect due to network issues.
0x80042108: Unable to connect to the server; check account settings.
0x800ccc0e: Connection to the server failed; verify server settings.
0x8004210b: Timeout while waiting for a response from the server.
0x800ccc0b: Unable to send message; check SMTP settings.
0x800ccc79: Unable to locate the specified folder.
0x800ccc67: The server did not respond promptly.
0x80040900: Unable to connect to the server; check your network connection.
0x800ccc81: The message was not sent; verify recipient details.
Additional Information
When addressing connectivity problems in Microsoft Outlook or Outlook Express, there are several additional measures and recommendations to enhance your experience and rectify the errors you may face.
Software Updates
Maintain Outlook Current – Regularly verify the availability of updates for Microsoft Outlook or Outlook Express. These updates frequently contain bug fixes and enhancements that can alleviate connectivity challenges.
Operating System Upgrades – Confirm your operating system is current, as updates to the system can influence software performance and compatibility.
Network Settings
Reboot Your Network Connection – Sometimes, restarting your router or modem can resolve connectivity problems. Disconnect the device, wait for a minute, and then reconnect it.
Choose a Wired Connection – If you currently use Wi-Fi, consider transitioning to a wired Ethernet connection to enhance stability and minimize potential interference.
Data Backup
Preserve Essential Data – Before implementing significant changes or reinstalling software, back up important emails and settings. Use export in Outlook to create copies of your data.