Software⏱️ 4 min read📅 2026-06-19

How to Fix: IMAP Email Error

IMAP email error message in Outlook 2010 and 2013, unable to connect to internal server.

Quick Answer: Try resetting mail accounts and profiles, and ensure the correct IMAP port is used (143 or 25).

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🛠️ Step-by-Step Verified Fixes
  3. 💡 Conclusion

IMAP email error message is causing issues with Outlook 2007, 2010, and 2013 users who have set up IMAP accounts on different domains and machines. The error message 'Fatal error: Did NOT connect to an internal server.: Cannot assign requested address' appears when setting up or using these accounts, but not in Outlook 2007.

This issue is frustrating for both the users and the hosting provider GoDaddy, as it prevents them from fully utilizing their IMAP email services. The goal of this troubleshooting guide is to help identify the root causes of this error and provide solutions to resolve it.

⚠️ Common Causes

  • The primary reason for this error is likely due to a misconfiguration or incompatibility between Outlook and GoDaddy's IMAP server settings. This can be caused by incorrect port numbers, server addresses, or authentication settings. Additionally, the use of different versions of Outlook (2010 and 2013) may also contribute to this issue.
  • Another possible reason is related to the email account setup on the user's machine or GoDaddy's server. It could be a problem with the DNS resolution, firewall rules, or antivirus software interfering with the IMAP connection.

🛠️ Step-by-Step Verified Fixes

Check and adjust Outlook settings

  1. Step 1: Open Outlook and go to File > Account Settings > Account Settings (or press Ctrl+Alt+Delete). Select the problematic account and click on 'Change'. In the 'Account Settings' window, select the 'Advanced' tab and check if the 'My Outgoing Server (SMTP) port' is set correctly. Try using a different port number, such as 25 or 587.
  2. Step 2: In the 'Outgoing Server (SMTP)' section, ensure that the 'Use this outgoing server for my email' checkbox is checked. Also, make sure that the 'Authentication' dropdown menu is set to 'Basic' or 'NTLM'. If you're using a different version of Outlook, try adjusting these settings accordingly.
  3. Step 3: Click 'OK' to save the changes and test the account again.

Verify server configuration

  1. Step 1: Check with GoDaddy's support team to verify that their IMAP server is configured correctly. They may have specific settings or recommendations for this issue.
  2. Step 2: Use a third-party email client, such as Thunderbird or Microsoft Outlook (version 2007), to connect to the same IMAP account. If the error persists in another client, it's likely a problem with GoDaddy's server configuration.
  3. Step 3: Try connecting to a different IMAP server using a different domain or TLD. This will help determine if the issue is specific to GoDaddy's servers.

💡 Conclusion

To resolve the IMAP email error message, try adjusting Outlook settings and verifying server configuration. If the issue persists, it may be necessary to contact GoDaddy's support team for further assistance. Remember to always keep your software and antivirus programs up-to-date to prevent similar issues in the future.

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