Emailing Invoices

Let me to help you sort things out, missmissySEI. 

To get this fixed, you can retoggle your email set up in your QuickBooks Desktop(QBDT). You can then resend a test transaction to check if the issue persists at your end or your customer's end. Follow these steps to send a test email from QuickBooks:

1. Select the Edit menu and select the Preferences. 
2. Select Send Forms from the menu and go to the My Preferences tab. 
3. Select QuickBooks E-mail or Webmail, and then OK. This toggles your preference off.
4. Repeat the steps. Go back to the My Preferences tab and select Outlook. Then select OK.
5. Close QuickBooks and all other open programs and then restart your computer.

It is also recommended to ensure that your Microsoft Office 365 is updated as sometimes an outdated version of Microsoft Office 365 can cause issues with sending and receiving messages.

If the issue still persists, try sending the invoice via Webmail instead of Outlook, as it could be an Outlook issue causing the problem.

For more details and information, please check out this article: How to fix "Error: QuickBooks is unable to send your email to Outlook"

Also, consider checking out this article for future reference: 

• Email sales forms, invoices, and statements in QuickBooks Desktop
• Fix undelivered invoices in QuickBooks Online

Please do not hesitate to contact us if you have any further queries regarding emailed invoices in QBDT. I am always here to help. 

Thank you so much, I will give that a try.  I pay for the monthly subscription to Microsoft 365 so I should have the up to date version of Outlook.  I know it used to work fine so I will try your suggestion.