Troubleshooting Outlook Errors 0x800CCC0E and 0x800CCC19

Errors 0x800CCC0E and 0x800CCC19 typically indicate a communication failure between your email client (such as Outlook or Windows Live Mail) and the mybox mail servers. While they share similar symptoms, they often point to slightly different underlying issues:

• 0x800CCC0E: Usually a “Connection Failed” error. It occurs when Outlook cannot find or reach the server at all, often due to a blocked port or incorrect server name.
• 0x800CCC19: Often a “Timeout” error. This occurs when a connection is established, but the server does not respond within the expected timeframe, frequently caused by security software interference.

Common Causes

1. Blocked Ports: Your Internet Service Provider (ISP) may be blocking port 25, or your local firewall is preventing traffic on port 587.
2. Antivirus Interference: Many antivirus programs include “Email Scanning” features that act as a proxy between Outlook and the internet. If this feature hangs, it can trigger a timeout (0x800CCC19).
3. Incorrect Authentication: The server may be rejecting the connection because the “My outgoing server (SMTP) requires authentication” setting is disabled.
4. Encryption Mismatch: Using a secure port (like 587) without enabling the corresponding encryption type (SSL/TLS) can cause the connection to fail.

How to Resolve

To fix these errors, verify your configuration in the Outlook account settings:

1. Check Port and Encryption Settings

Ensure your outgoing server settings match the mybox requirements:

• Outgoing Server (SMTP): smtp.mybox.com
• Port: Use 587 (Recommended) or 25.
• Encryption: If using port 587, set the encryption type to STARTTLS or TLS.

2. Enable SMTP Authentication

• Go to More Settings > Outgoing Server.
• Check the box: “My outgoing server (SMTP) requires authentication”.
• Select: “Use same settings as my incoming mail server”.

3. Configure Security Software

If the error persists, temporarily disable your antivirus email scanner or firewall to see if the connection is restored. If it works, you should add an exception for Outlook or port 587 rather than leaving your protection disabled.

4. Increase Server Timeouts

For error 0x800CCC19, increasing the “Server Timeouts” slider in the Advanced tab to 2 minutes or more can prevent the connection from dropping during large syncs or slow network conditions.

Practical Implications

• Port 587 Reliability: Port 25 is frequently restricted by residential ISPs to combat spam. Switching to port 587 is the standard “best practice” for ensuring your mail is sent reliably from any network.
• Safe Mode Test: If you suspect an add-in or antivirus is the cause, try opening Outlook in Safe Mode (hold Ctrl while clicking the Outlook icon). If it works in Safe Mode, the issue is likely a local software conflict.
• Stuck Messages: A large unsent email stuck in your Outbox can sometimes trigger these errors. Delete any pending messages in your Outbox and try sending a simple text-only test email to yourself.

Summary

Errors 0x800CCC0E and 0x800CCC19 are connection-level issues. By ensuring you are using port 587, enabling SMTP authentication, and adjusting your firewall to allow mail traffic, you can restore a stable link between your computer and the mybox infrastructure.