Bluehost: Outlook Error Codes
This guide helps with email error codes, specifically Outlook error codes, and other versions of the Outlook email client and/or software.
- Protocol Errors: Troubleshooting for SMTP ("Outgoing Mail Server") Errors (sending) and IMAP/POP3 ("Incoming Mail Server") Errors (receiving).
- Error Codes: Official Microsoft Outlook Error Codes References.
- Connection Fixes: Configuration notes, Login Issues, resolving port conflicts, SSL/TLS, and email server connection timeouts, Authentication, and password issues.
If you are setting up a new account or need to fix a sudden connection drop, use the information below to help identify Bluehost email Outlook error codes to resolve the issue.
SMTP ("Outgoing Mail Server") Errors
550 External MTAs must be authenticated
This typically means the outgoing server requires authentication. Make sure “My outgoing server (SMTP) requires authentication” is checked in your email client settings.
Socket Error 10061 or Port Issues
Connection failures often happen due to incorrect port numbers. Use port 25 or 26 for SMTP (many ISPs block port 25). Ensure the outgoing port is set correctly.
IMAP and POP3 ("Incoming Mail Server") Login Issues
Login rejected, -ERR Login failed
Double-check your username and password. For Bluehost, the username should be your full email address. If password issues persist, reset your email password via Bluehost’s cPanel.
Host could not be found
Verify your incoming mail server is set to mail.yourdomain.com. Check for typos or DNS propagation issues. Using the IP address of the mail server can help if the hostname is unresolved.
Authentication failed (Secure Password Authentication - SPA enabled)
Bluehost does not support SPA; disable “Log on using Secure Password Authentication” in your client.
Connection errors / Sudden disconnects
Ensure you are using the correct incoming ports:
- Port 110 for POP3 and port 143 for IMAP without SSL
- Port 995 for POP3 and port 993 for IMAP with SSL/TLS
Configuration Notes
- Do not set a root folder path for IMAP; leaving this blank is recommended.
- For outgoing mail, always enable server authentication.
- When using SSL/TLS, double-check that port numbers match the security protocol.
Official Microsoft Outlook Error Codes Reference
| Error Code | Description / Resolution |
|---|---|
| 0x800CCC65 | Local firewall (e.g., Zone Alarm) or anti-virus software (NOD32, Norton, McAfee) is blocking outgoing connections to your mail server. Try disabling this software to see if the error persists. |
| 0x800CCC67 | Likely causes: ISP blocking port 25, local firewall or antivirus blocking SMTP, or incorrect Outlook setup. Change the SMTP port from 25 to 26 and disable firewalls/antivirus. |
| 0x800CCC78 | Sender address must be a full email address, not a username alone. Sender address must be a full email address, not a username alone. Use a full address, such as [email protected], in Outlook/Outlook Express. |
| 0x800CCC79 | Your client must authenticate SMTP before POP. Ensure that SMTP authentication is enabled in your mail client settings. |
| 0x800CCC92 | Possible password issue or corrupted email account. Please access your cPanel to reset the email password or repair the account. |
| 0x8004210B | Client-side issue. See Microsoft Documentation: Outlook Error 0x8004210B |
| 0x8004210A | Client-side issue. See Microsoft Documentation: Reported Error 0x8004210A |
| 0x800C0133 | The Outlook Express mail store may be corrupt. See Microsoft newsgroup: Outlook Express Error Message 0x800C0133 |
| 0x800CCC19 | Client-side problem likely caused by local anti-virus software. See Microsoft Documentation: Windows Live Mail Error ID: 0x800CCC19 |
| 0x800CCC0D | Server name could not be found. See Microsoft Documentation for common work fixes: Outlook Error 0x800ccc0d |
| 0x800CCC0E | It could be due to ISP blocking required ports or connection failure. See Microsoft Documentation: Outlook Error 0x800CCC0E |
| 0x800CCC0F | Many client-side causes, including local firewalls. See Microsoft Documentation: Error Code 0x800ccc0 |
| 0x800CCC0B | Common client-side work fixes. See Microsoft Documentation: Error code: 0x800CCC0B |
| 0x800CCC69 | Outgoing server requires authentication. Ensure “My outgoing server (SMTP) requires authentication” is checked. |
| 0x800CCC90 | Login failed — Incorrect password or username. Verify credentials or reset password. |
| 0x800CCC18 | Secure Password Authentication (SPA) is not supported. Uncheck SPA in your mail client settings. |
Review Microsoft's official documentation for further information if needed.
Additional Troubleshooting Tips
- Restart your computer to clear temporary glitches.
- Temporarily disable firewall or antivirus software, as they can block mail client connections.
- Ensure you use your full email address, e.g.,
[email protected], as the email user ID. - If problems persist, try your ISP’s SMTP server as a test to isolate whether Bluehost servers or your local network/ISP is the issue.
- Check Bluehost’s system status or contact support if you suspect server-side issues.
- Also, enabling "Outgoing server requires authentication" is vital for sending mail.
- Temporarily disabling the firewall or antivirus software can help diagnose connection problems.
- When in doubt, verify settings in Bluehost’s cPanel.
Summary
Most Bluehost-related problems when using Outlook, IMAP, and POP3 stem from a wrong server name, ports, authentication details, or information entered. To solve problems associated with Bluehost email services, you must know that your entire email address is required when entering your details, you must use the right ports, and you should disable your Secure Password Authentication. If these steps don’t resolve the problem, consider consulting Bluehost support or your Internet Service Provider (ISP).
Following these guidelines and other information and tips included in this guide will restore reliable email functionality quickly and efficiently.