Thanks for writing to us and sharing your feedback with us, @RSnell13,

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

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

To help you fix this, 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.

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. Choose 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. Click Save/Save File to download the update.
8. Once downloaded, double-click the file to install the update.

If you're using web mail, check the settings in the Preferences window:

1. At the top menu bar, click Edit then Preferences.
2. Tap the Send Forms menu and go to My Preferences tab.
3. Select the email account you're using, then press Edit.
4. Mark the SSL box, or just select Default.
5. In the Server Name field, make sure the server name matches your email provider's settings. If it shows smtp.mail.yahoo.com for example, change the name intuit.smtp.mail.yahoo.com and click OK.
6. If you see an Use enhanced security box, ensure it has a check on it.

If you're getting an incorrect password error message, please follow the detailed steps in this article to resolve this: QuickBooks Will Not Accept my WebMail Password.

Once done, try sending the email again and see if goes through successfully. If not, let's delete and recreate your email profile. Here's an article with the complete steps on how to set up your email service in QuickBooks Desktop.

However, if you're using Outlook, we have a current investigation with QuickBooks (Desktop) is unable to send your emails to Outlook. In the meantime, you can follow the steps suggested in this link: How to fix "Error: QuickBooks is unable to send your email to Outlook"

If all else fail for Webmail or you're getting the same Outlook error, 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. They can also add your account to the investigation to receive notifications if you are using Outlook.

Here's how to get support:

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

Kindly update me on the results in the comment. I want to ensure everything is working well for you, and I'm here to provide further assistance and insights. Have a great day!