QuickBooks Is Unable to Send Emails Due to Network Connection Failure Error

It is found that this kind of mishap can significantly impact your productivity and even result in business loss. If you fail to send your invoices using the QuickBooks Desktop Webmail feature, then the problem is very likely related to the incorrect webmail preferences. QuickBooks is unable to send emails due to a network connection failure, which is a very common error encountered by several QuickBooks users.

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This error generally takes place due to a Settings problem. A lack of proper application setup and failure to configure correct Windows Firewall rules not only cause server connection errors while sending emails but also trigger several other bugs and errors. In your QuickBooks account, if you see an error like “QuickBooks is unable to send emails due to network connection failure,” then don’t worry, it is all about a settings problem. This can be cured by setting the correct settings according to the requirements.

Some Common Error messages with solutions

You have entered an incorrect email address or password – Log in to your email account using the web browser. Then check whether the email address and password you entered are working or not.
You are not connected to the internet, or the firewall is blocking the connection – Try to open the Internet Explorer browser and then open the website in it to check the internet connection.
Your email server settings are incorrect – You have to check and verify that your settings of webmail preferences are correct.

Causes of QuickBooks being Unable to Send Emails due to Network Connection Failure?

Many reasons for the cause of QuickBooks are the inability to send emails due to network connection failure.

Some of them are listed here:-

Incorrect Email Server Configuration: When QuickBooks shows you the Server connection error while sending the OP to someone, the problem might be due to incorrect email server configurations are incorrect.
Installed QuickBooks is Not Upto-Date (The installer files got damaged): Sometimes, when QuickBooks is not installed properly or stopped while installing in between, it can cause a problem in sending emails with QuickBooks.
Not having Privileged Windows rights: When there are no Windows user admin rights on QuickBooks. In this case, QuickBooks can cause errors while sending emails.
More than one Windows running simultaneously: If there is more than one Windows that are running QuickBooks, then you might encounter the QuickBooks not being able to send emails.
When you’re offline: Sometimes, due to hardware or network issues, you go offline; in this case, you’re not able to send emails from QuickBooks. (Note: Make sure to check your internet connection inside your desktop or your connected device.)
Due to corrupted or damaged MAPI32.dll: (Mapi32. dll is considered a type of Extended MAPI 1.0 for Windows NT files. It is most commonly used in Microsoft Exchange, developed by Firetrust Ltd.. It uses the DLL file extension and is considered a Win32 DLL (Dynamic Link Library) file. Mapi32.) Sometimes it gets corrupted or damaged. Look for it and fix the root cause.

Related Topic: QuickBooks Won’t Send Email Invoices

Solution to Fix QuickBooks Unable to Send Emails Due to Network Connection Failure

The issue “QuickBooks unable to send emails due to network connection error can be very frustrating and hard to handle for a non-techy guy. If you go through the guide below, you’ll fix this issue without any hurdles.

There are specific solutions according to the specific error messages displayed on your screen. Below you get the error message with its solutions. You can also go with the solution or step according to the reason that causes this problem.

Error message – Could not connect to the email server

Solution 1: Use QuickBooks Tool Hub

To fix the problem “QB not able to send emails due to network connection failed,” one must download and run the QuickBooks Desktop (QBDT) Tool Hub as shown below.

First of all, download QuickBooks Desktop Tool Hub from the official website of Intuit.

After downloading & completing the installation process, run this tool with admin rights.
With the help of multifarious features of the QBDT tool, diagnose QuickBooks for all the data and network-related issues.

quickbooks tool hub

Multiple tools with various features are designed to diagnose all kinds of problems. QuickBooks File Doctor Tool, Quick Fix My program, and QuickBooks Install Diagnostic Tool)

Solution 2: You have to configure the Webmail Preferences

QuickBooks is Unable to Send Emails Due to Network Connection Failure error prompt can pop up if you are using the wrong or improper webmail preferences. So all you need to configure it is with the help of the steps.

Run QuickBooks with the Admin Rights & go to the Edit menu option
From further options displayed, click on the Preferences, Go to the left-side pane & Hit on the “Send Forms” option.
Now, click on My Preferences in the My Preferences
Choose the email account you are using
Then you have to click on the Edit option
The Edit email information screen opens up
In this, you have to go to the section of SMTP Server Details
Now, set the port and server name in the settings of the email provider
Now close QuickBooks. After that, the next step is to restart Windows and then run QuickBooks as an admin again.
Now, try sending a test email from your QuickBooks Software.

Solution 3: Update QuickBooks to the latest version

To avail of all the new & advanced features, users are supposed to keep their software up-to-date. Otherwise, they won’t be able to run it for long. Moreover, if the “QuickBooks is Unable to Send Emails Due to Network Connection Failure” error message is frequently appearing on your screen, then you are recommended to update your QuickBooks software to the most recent version. Here’s how;

First of all, close the QuickBooks software and all other programs in your system.
Go to the QuickBooks icon
Then right-click on the QuickBooks icon and select the option Run as Administrator
In QuickBooks, go to the Help menu option and click on it
Choose Update QuickBooks Desktop from the options
Go to the tab named Options in the update window
You have to tick the option Mark All
Then click on the Save button to save all the changes
In the tab Update Now, click on the Reset Update checkbox
After this, when you are ready, click on the Get Updates
Wait for it for successful completion
Set the updates as Automatic updates so that you won’t have to check them again, and don’t want to do it manually. The steps to set it to automatic updates are:-
- In QuickBooks, click on the Help menu option
- Further, click on the option Update QuickBooks Desktop
- In the Update QuickBooks window, click on the Update Now tab

You can also click on the box Reset Updates, which clears all the previous update downloads
Click on the Get Updates button to download the updates
After completing the download of the update
Restart your QuickBooks software
After the restart, when you get the pop-up screen
Then accept to install the new update that you have downloaded before.

Solution 4: Make Internet Explorer the default

After managing Internet Explorer’s default settings, you can easily get rid of the “QuickBooks is Unable to Send Emails Due to Network Connection Failure” error code. To do so, perform the steps outlined below;

For this, open Internet Explorer
Click on the 3 dots on the top right side of the window
From drop-down options, select Tools that you can also open up by pressing the Alt + T keys together
Click on the Internet Options
Choose the Advanced tab
You have to click on the Restore Advanced Settings
When it is done, click on the OK button and close the browser.

Solution 5: Check the Settings of Webmail

After correcting the webmail setting, you can easily fix the problem “QuickBooks is not able to send emails due to network server failure”. Follow the instructions below;

Run QuickBooks as an administrator.
Go to the Edit menu, then Preferences.
Choose Send Forms.

Click My Preferences and select the email account.
Click Edit.

Now, finally, in SMTP Server Details, enter the server name and port.

Related Issue: Outlook is Missing QuickBooks Send Forms Preferences

Solution 6: Clean and Install QuickBooks

If all the above methods prove futile in solving the error you are facing, clean and reinstall the program. The steps are:

Click on “Control Panel”.
Navigate to “Programs and Features” and click “QuickBooks”.
Right-click on the program and then tap on the “Uninstall” option.
Now, enter the QB folder to rename it.
Reinstall the program on your system.
Use the product key and the license to activate QuickBooks.
After all the steps are done, run QB as an administrator.
Check whether the test email you sent is successful or not.

Solution 7: Try using a different email client.

Using a different client email, follow the following steps:

Open your preferred email client, like Gmail, Outlook, etc.
Compose a new email.
Enter the subject and the recipient’s email address.
Type in the mail body.
Attach the essential attachments and hit the “Send” tab.

Solution 8: Repair the MAPI32.dll

The MAPI32.dll file monitors email messages along with various functions in Outlook. To repair this program:

From the “Control Panel”, tap on either “Add/Remove Programs” or “Programs and Features”.
Seek the Outlook programs from the list of installed programs.
Tap on “Open” to enter the world of Microsoft Office setup.
Select “Repair”.
Reboot the system after the repair is complete.

Related Topic: Fix QuickBooks Unable to Send your Email to Outlook

Conclusion

QuickBooks is unable to send emails due to a network connection failure. The error often stems from misconfigured email settings, outdated Outlook components, or firewall restrictions. By updating QuickBooks, verifying email preferences, repairing the MAPI32.dll file, and allowing QuickBooks through your firewall, you can restore smooth email functionality.

If these steps don’t solve the issue, it may require deeper troubleshooting involving Windows components or server permissions. Contacting QuickBooks support or your IT administrator ensures your email setup remains secure and fully functional for sending invoices, estimates, and other business communications.

Frequently Asked Questions

What causes the “QuickBooks is unable to send emails due to network connection failure” error?

This error usually occurs due to incorrect email settings in QuickBooks, damaged MAPI32.dll files, outdated Outlook configuration, firewall restrictions, or unstable internet connections.

Does this error affect all email providers?

Yes, it can affect Gmail, Outlook, Yahoo, and other providers. Each may require specific SMTP or security settings to work properly with QuickBooks.

How do I check my email preferences in QuickBooks?

Go to Edit → Preferences → Send Forms, select your email provider, and verify that all login credentials, SMTP ports, and SSL options are correct.

Why does this issue occur after a QuickBooks update?

After an update, email settings or MAPI components may reset or become incompatible with your Outlook version, causing the network connection error.

Can firewall or antivirus software block QuickBooks emails?

Yes. Overly strict firewall or antivirus settings can block QuickBooks from connecting to your email server. Add QBW32.exe and QBDBMgrN.exe as trusted programs to resolve this.

How do I repair the MAPI32.dll file in Windows?

Close all applications, open the C:\Windows\System32 folder, locate MAPI32.dll, and rename it to MAPI32.old. Then, run the FixMAPI.exe utility from the same folder to recreate the file.

Can I use webmail if Outlook fails in QuickBooks?

Yes. You can set up webmail in QuickBooks by going to Edit → Preferences → Send Forms → Webmail → Add, and entering your email credentials and correct SMTP details.

What if none of the troubleshooting steps work?

If the error persists, you can temporarily use Outlook’s standalone client to send invoices or contact QuickBooks Support for advanced troubleshooting.

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