Hi there, @NaplesFlorida.

Thanks for sharing your feedback with us.

There are a few possible reasons why your email won't work in QuickBooks:

• Domain admin permissions.
• The email preference being set incorrectly.
• Security settings from your email provider blocking Intuit processes.

To isolate the issue, we want to make sure your QuickBooks Desktop software is in its latest release. QuickBooks periodically provides maintenance release and software updates to fix emailing issues, add features or enhancements, and update compliance information.

Let's try downloading the release patch from the internet, by following the steps below:

1. Click this link Downloads & Updates.
2. Add your location from the Select Country drop-down.
3. On the Select Product drop-down, choose your QuickBooks Edition.
4. Select the version year of your product from the Select Version drop-down.
5. Hit the Search button
6. In the Here’s your product section, click the Get the latest updates link.
7. Choose Save/Save File to download the update.
8. Once downloaded, double-click the file to install the update.

For more details on how to set up your email service in QuickBooks Desktop, you can check out this article: Connect your email to QuickBooks Desktop

If the issue persist, I recommend contacting one of our Technical Support Team. They have the tools necessary to check your company file and help you send invoices without issues.

Here's how to get support:

1. Go to the Help menu.
2. Choose QuickBooks Desktop Help.
3. Tap the Contact us button.

Additionally, you can browse our Help articles page for reference. There, you can read articles that will guide you in completing your future tasks.

Please know that I'm just a reply away if you have any other questions about this concern or with QuickBooks. I'd be pleased to help you out. Take care and have a good one.