Thanks for joining in this thread, @RichelleJ. We can check the web mail's settings to send invoices seamlessly.

Here's how:

1. At the top menu bar, click Edit, then choose Preferences.
2. Click Send Forms on the left panel., then select the email account you're using under the My Preferences tab.
3. Click 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.

The following articles provide more information about sending invoices in QBDT:

• Set up an email service
• Error: Could not connect to the email server
• Update to the latest release of QuickBooks Desktop

If you get the same result, I recommend contacting our Technical Support to help you check what's causing the issue and help you fix it.

Let me know if you have any other concerns. I'll be here to guide you some more.