How to Fix QuickBooks Email Network Connection Failure

QuickBooks Email Network Connection Failure is a connectivity error that occurs when QuickBooks Desktop cannot connect to the email server configured for sending invoices, reports, or other documents. The QuickBooks email error happens when incorrect email settings, unstable network connectivity, firewall restrictions, authentication problems, or QuickBooks configuration issues prevent the application from establishing the required connection. Common error messages related to QuickBooks email not working include.

This failure can trigger messages such as:

• “QuickBooks is unable to send your email to Outlook due to network connection failure”
• “Could not connect to the email server”
• “Connection has been lost”

In this guide, we’ll discuss the causes of QuickBooks Email Network Connection Failure, troubleshooting methods, email and network settings, firewall configurations, and ways to prevent the QuickBooks cannot send email issue.

What Causes QuickBooks Email Network Connection Failure?

Common causes of QuickBooks Email Network Connection Failure include incorrect email settings, expired authorization, security restrictions, network problems, or issues within QuickBooks Desktop.

Here are the most common causes of QuickBooks email connection problems:

• Incorrect QuickBooks Email Server Configuration
• Expired or Invalid Email Authorization
• Firewall or Antivirus Interference
• Corrupted Windows MAPI Components
• Outdated QuickBooks Desktop Version
• Unstable or Restricted Network Connection
• Damaged QuickBooks Program Files

How to Identify QuickBooks Email Connection Problem?

QuickBooks Email Network Connection Failure shows up through failed emails, connection error messages, repeated authentication prompts, stuck outbox messages, and QuickBooks freezing during email delivery.

Here are the key signs that indicate a QuickBooks email connection problem:

• Email Connection Error Messages
• Individual Emails Fail to Send
• Multiple Emails Fail During Bulk Sending
• Repeated Email Authentication Prompts
• Repeated Requests to Reauthorize the Email Account
• Emails Remain Stuck in the Outbox
• QuickBooks Freezes During Email Sending
• Email Works Outside QuickBooks but Fails in QuickBooks
• QuickBooks Fails to Connect to the Configured Email Server

What to Do Before Troubleshooting QuickBooks Desktop Email Error?

Before troubleshooting QuickBooks Email Network Connection Failure, complete a few basic checks to protect your company data and identify common email, network, authentication, and configuration issues.

Here are the key checks to complete before troubleshooting the QuickBooks Desktop email error:

Parameters	Details
Create a Company File Backup	Back up your QuickBooks company file before changing any other software, email, or networking settings.
Close Other Applications	During the troubleshooting process, close any unneeded applications and background processes to eliminate possible software conflicts.
Verify Internet Stability	Open a browser to verify that your computer is connected to the internet.
Check Date, Time, and Time Zone	Make sure that the date, time, and time zone in Windows are correct, as this can affect secure email connections.
Test Your Email Account	Try logging into the webmail version of your email account, or using an email program compatible with your account type, to ensure that your username, password, and other authentication information are correct.
Review Current Email Settings	Make note of your current QuickBooks email server, port, and any other QuickBooks email settings before you change or reset them.

Methods to Fix QuickBooks Email Network Connection Failure

To fix QuickBooks Email Network Connection Failure, first check your internet connection and email authorization, then review QuickBooks email settings, security restrictions, and software components. Here are the proven methods to fix the QuickBooks email connection problem.

Method 1: Check Your Internet Connection

QuickBooks Desktop needs a stable internet connection to communicate with online email services.

Follow these steps to verify your internet connection:

• Open a web browser on the computer where QuickBooks Desktop is installed.
• Visit multiple websites to confirm that the internet connection is working consistently.
• Sign in to your email account through its webmail service.
• Send a test email directly from the webmail service.
• If you are using a VPN or Proxy Service, disconnect from it for the time being if network policy allows.
• Resend the email from QuickBooks Desktop.

If webmail also fails, resolve the internet or email-provider issue before changing QuickBooks settings. If webmail works normally but QuickBooks does not, continue with the next method.

Method 2: Reauthorize Gmail or Outlook in QuickBooks

Recent changes to Gmail and Outlook can cause QuickBooks Desktop to display “QuickBooks is unable to send emails due to network connection failure.”

Here is how to reauthorize Gmail or Outlook in QuickBooks Desktop:

• Update QuickBooks Desktop to the latest available release.
• Open a transaction or report that you normally send by email.
• Select Email and then select Send.
• Enter your Intuit credentials if QuickBooks prompts you to sign in.
• Select Continue in the Webmail Authorization window.
• Follow the authorization instructions displayed for Gmail or Outlook.
• Select Allow when prompted to authorize QuickBooks.
• Return to QuickBooks Desktop and send a test email.

Do not change Microsoft permissions unnecessarily. Intuit’s current reauthorization guidance specifically directs users to complete the authorization process and select Allow.

Method 3: Verify QuickBooks Webmail and Email Preferences

Incorrect Webmail preferences can prevent QuickBooks Desktop from using the selected email account.

Use these steps to review your QuickBooks email preferences:

• Open QuickBooks Desktop.
• Select Edit > Preferences.
• Select Send Forms.
• Select My Preferences.
• Select the email account you use.
• Select Edit.
• Review the Webmail account and authentication settings.
• If you are using Custom SMTP, check the SMTP server, port, encryption, and authentication settings with your email provider.
• Save the settings.
• Send a test email from QuickBooks.

Do not enter SMTP details based on another provider. Gmail, Outlook, and other email services can use different servers, ports, encryption, and authentication requirements.

Method 4: Review QuickBooks Internet and Secure Connection Settings

QuickBooks Desktop uses Windows internet settings when establishing certain online connections.

Follow these instructions to review the available internet connection settings:

• Open QuickBooks Desktop.
• Select Help > Internet Connection Setup.
• Select Use my computer’s Internet connection settings.
• Select Next.
• Open Advanced Connection Settings if the option is available.
• Review the Advanced settings.
• Verify the secure connection settings required by your QuickBooks Desktop version and Windows configuration.
• Save any necessary changes.
• Restart QuickBooks Desktop.
• Try sending an email again.

Method 5: Check Firewall and Antivirus Settings

Antivirus software such as Windows Firewall or other applications can prevent QuickBooks from communicating over the network.

Here are the steps to check your firewall and antivirus permissions:

• Open the Windows Start menu.
• Search for Windows Defender Firewall and open it.
• Select Allow an app or feature through Windows Defender Firewall.
• Select Change settings if required.
• Ensure that QuickBooks has permission to go through the firewall.
• Check your third-party antivirus or security program for blocked QuickBooks components.
• Check whether the security software has an email-filtering feature that is blocking QuickBooks.
• Allow the required QuickBooks components according to your security software’s instructions.
• Restart QuickBooks Desktop.
• Send a test email.

Never disable your antivirus software or firewall permanently to remove the error. If your organization manages these settings, then you should contact your network administrator before making changes.

Method 6: Update QuickBooks Desktop

Updating QuickBooks Desktop ensures that you use the latest available release for your installed version.

Follow these steps to update QuickBooks Desktop:

• Open QuickBooks Desktop.
• Select Help > Update QuickBooks Desktop.
• Open the Update Now tab.
• Select Reset Update if you want to clear previously downloaded update files.
• Select Get Updates.
• Wait for the update to finish downloading.
• Close and reopen QuickBooks Desktop when prompted.
• Install the available update.
• Open your company file.
• Send a test email.
• After updating, retry the email function before moving to more advanced troubleshooting.

Method 7: Reset Applicable Internet Explorer Settings

Some QuickBooks Desktop workflows can depend on Windows components associated with Internet Explorer. If Internet Explorer is available in your QuickBooks environment, use these steps:

• Close QuickBooks Desktop.
• Open Internet Explorer.
• Select Tools or the gear icon.
• Select Internet Options.
• Open the Advanced tab.
• Select Restore advanced settings.
• Select OK.
• Close Internet Explorer.
• Restart the computer.
• Open QuickBooks Desktop and test the email function.

Method 8: Run QuickBooks Tool Hub

QuickBooks Tool Hub provides utilities for common QuickBooks Desktop problems, including networking, company file, installation, and program issues. Use the following steps to run the appropriate Tool Hub utility and fix the QuickBooks email not working issue.

• Close QuickBooks Desktop.
• Download the latest supported QuickBooks Tool Hub from Intuit.
• Open the downloaded QuickBooksToolHub.exe file.
• Follow the installation instructions.
• Launch QuickBooks Tool Hub.
• Select Network Issues when the problem involves network or company-file connectivity.
• Run the applicable network troubleshooting tool.
• If the problem pertains to the company file as well, use Company File Issues and run the appropriate File Doctor tool.
• If advised to do so by the troubleshooting tool, restart the device.
• Open QuickBooks Desktop and test the emailing function.

Method 9: Rename the QuickBooks Network Data (.ND) File

A QuickBooks .ND file contains network configuration information used to access a company file in a network or multi-user environment. Use this method only when the QuickBooks email network connection failure occurs alongside company-file or multi-user network problems:

• Close QuickBooks Desktop on all computers using the company file.
• Open the folder containing the QuickBooks company file.
• Locate the corresponding .ND file.
• Right-click the .ND file and select Rename.
• Add .OLD to the existing .ND filename.
• Press Enter.
• If required, use QuickBooks Database Server Manager to rescan the company file folder and create a new .ND file.
• Reopen QuickBooks Desktop.
• Open the company file.
• Test the affected QuickBooks functions.

Do not use this method as a first-line solution for a standalone email authorization problem. Intuit identifies .ND files primarily with network and multi-user company-file access.

Method 10: Repair QuickBooks Desktop

If your email account, authorization, connection, firewall, and settings are all correct, but QuickBooks Desktop cannot send email, repair QuickBooks Desktop. Here is how to repair QuickBooks Desktop:

• Close QuickBooks Desktop.
• Create a current backup of your company file.
• Open QuickBooks Tool Hub.
• Select Program Problems.
• Select Quick Fix My Program.
• Allow the tool to close QuickBooks processes and complete the repair.
• Reopen QuickBooks Desktop.
• Open your company file.
• Send a test email.

If Quick Fix My Program does not resolve the problem, use the applicable installation repair or diagnostic option provided through Tool Hub.

How to Prevent QuickBooks Email Connection Problems?

To prevent the QuickBooks Desktop email error, keep QuickBooks Desktop updated, maintain valid email authorization, and ensure your email configuration matches your provider’s current requirements.

Here are the key practices you can follow to prevent recurring QuickBooks email connection problems:

• Keep QuickBooks Desktop updated to receive current program fixes and security improvements.
• Reauthorize Gmail or Outlook when QuickBooks requests permission or your email provider changes its authentication requirements.
• Review your email configuration after changing your email password, authentication method, or account security settings.
• If you use custom SMTP, verify the server address, port, encryption, and authentication details against your provider’s current requirements.
• Test QuickBooks email after major software, email, or network configuration changes to confirm that sending still works.
• Keep regular backups of your QuickBooks company file before making significant configuration changes or performing advanced troubleshooting.

Conclusion

To resolve QuickBooks Email Network Connection Failure, check your internet connection, reauthorize Gmail or Outlook, verify QuickBooks email settings, review secure connection settings, and check firewall restrictions. Updating QuickBooks Desktop, using QuickBooks Tool Hub, and repairing the installation can also resolve persistent configuration or program issues.

Begin with email permissions and configuration, then progress to network, firewall, and QuickBooks repair solutions as necessary. If the QuickBooks email error still exists after doing this, look for current information on authentication and SMTP requirements from your email provider, or contact them for version-specific troubleshooting.

Frequently Asked Questions