QuickBooks Has Stopped Emailing Invoices – Here Is How to Fix It Fast

When QuickBooks stops emailing invoices, business workflow is interrupted, payments can be delayed, and customer communication suffers. We understand how essential reliable invoicing is, so this comprehensive guide explains why QuickBooks fails to send emails and provides accurate, step-by-step solutions to restore seamless emailing functionality in QuickBooks Desktop and QuickBooks Online.

Common Reasons QuickBooks Stops Sending Invoices

Before applying fixes, it’s important to identify what causes QuickBooks email failures. The most frequent issues include:

• Incorrect email preferences or misconfigured settings
• Outdated QuickBooks version
• Damaged or missing MAPI32.DLL file
• Firewall, antivirus, or security conflicts
• Email provider security updates
• Incorrect server, SSL, or port configurations
• Damaged company data files
• Outlook integration errors

Understanding the root cause allows you to apply the correct fix efficiently.

Check and Correct Email Preferences in QuickBooks

Start by confirming that email settings are correctly configured.

For QuickBooks Desktop

1. Open QuickBooks
2. Select Edit > Preferences
3. Click Send Forms
4. Choose your email provider
5. Ensure your email address is valid
6. Confirm server credentials, SSL, and ports
7. Click OK to save

Restart QuickBooks and test sending an invoice.

Verify Outlook or Email Client Settings

If you use Outlook integrated with QuickBooks, incorrect Outlook configuration can stop invoice emails.

• Ensure Outlook is set as default email app
• Confirm Outlook opens manually without errors
• Check Outbox, Draft, and Sent folders
• Clear stuck emails
• Make sure you are signed in correctly

Set Outlook as Default Email Program

1. Open Control Panel
2. Go to Default Programs
3. Select Set Default Programs
4. Choose Outlook
5. Click Set as Default

Now retry sending invoices from QuickBooks.

Repair the MAPI32.DLL File (QuickBooks Desktop)

A damaged MAPI32.DLL file stops QuickBooks from communicating with email software.

Repair Steps

1. Close QuickBooks
2. Navigate to:
   C:\Windows\System32
3. Locate MAPI32.DLL
4. Rename to MAPI32.OLD
5. Restart your computer
6. Windows will automatically recreate a fresh file

Open QuickBooks and try emailing again.

Update QuickBooks to the Latest Version

Running outdated QuickBooks software can cause compatibility failures with email platforms.

Update QuickBooks Desktop

1. Open QuickBooks
2. Select Help
3. Click Update QuickBooks Desktop
4. Choose Update Now
5. Install updates and restart

After updating, test email functionality.

Check Email Server and Security Settings

Security or server conflicts may block invoice emails.

Do the Following

• Whitelist QuickBooks in Firewall & Antivirus
• Allow QuickBooks in Windows Defender
• Enable Less Secure App Access if using Gmail (if applicable)
• Ensure SSL/TLS is enabled
• Verify SMTP server settings
• Confirm correct port numbers (commonly 465 or 587)

Restart QuickBooks and send a test invoice.

Fix Email Issues in QuickBooks Online

If QuickBooks Online has stopped emailing invoices, follow these steps:

1. Go to Settings > Company Settings
2. Select Sales
3. Under Messages, verify email details
4. Confirm email template is valid
5. Check Spam, Junk, and Promotions folders
6. Add Intuit service email to safe sender list
7. Ask customers to whitelist QuickBooks sender address

Send another invoice to confirm success.

Use Webmail Correctly in QuickBooks Desktop

For users who integrate QuickBooks with Gmail, Yahoo, or other webmail, incorrect credentials trigger email failures.

Configure Webmail Properly

1. Open QuickBooks
2. Go to Edit > Preferences
3. Select Send Forms
4. Add your Webmail account
5. Enter email address and provider
6. Input correct SMTP server
7. Enable SSL
8. Save settings

Restart QuickBooks.

Repair QuickBooks Installation Files

If QuickBooks program files are damaged, emailing will fail.

Run QuickBooks Tool Hub

1. Download and install QuickBooks Tool Hub
2. Open the tool
3. Select Program Problems
4. Click Quick Fix My Program

After repair completes, reopen QuickBooks and email an invoice.

Check Company File for Corruption

A damaged company file may prevent invoice emails.

Verify and Rebuild Data

1. Go to File
2. Click Utilities
3. Select Verify Data
4. If issues are found, choose Rebuild Data

Try emailing again.

Ensure Correct User Permissions

Limited access can restrict email capability.

Adjust Permissions

1. Open Company Settings
2. Select Users
3. Edit assigned permissions
4. Allow Send Forms / Email Access

Save and retry.

Test Email Outside QuickBooks

To ensure the problem is QuickBooks-related:

• Log in to your email account separately
• Send a test email
• Confirm it sends successfully

If email fails outside QuickBooks, resolve email account issues before troubleshooting QuickBooks.

Final Steps If Nothing Works

If QuickBooks still won’t email invoices:

• Restart your system
• Reinstall Outlook (if used)
• Reinstall QuickBooks using Clean Install
• Contact Intuit Support if persistent issues remain

Prevent QuickBooks Email Problems in the Future

To avoid recurring issues, follow these best practices:

• Keep QuickBooks updated
• Maintain email security settings
• Regularly verify company data
• Avoid expired passwords
• Ensure Outlook or email client is stable
• Backup QuickBooks regularly

Conclusion

When QuickBooks stops emailing invoices, it disrupts financial operations, affects cash flow, and delays communication. By checking email preferences, updating software, repairing system files, adjusting security settings, and verifying email credentials, businesses can restore flawless invoice emailing quickly and confidently. These proven troubleshooting steps ensure your invoicing remains smooth, professional, and uninterrupted.