Hello @dbr2,

I know some users who want to use a different email provider for sending emails. I'm here to help you fix the issue in QuickBooks Desktop.

You can perform some basic troubleshooting to isolate and fix the issue. Let's identify if the problem is only happening to a specific company file.

I suggest you start by updating QuickBooks Desktop to the latest release. Aside from improving the performance of the software, this process also fixes common and complicated errors automatically.

Here's how:

1. Click the Help tab in the upper-right corner, then select Update QuickBooks Desktop.
2. Go to the Update Now tab.
3. Select the updates you want to include.
4. Put a checkmark on the box beside Reset Update.
5. Hit Get Updates. 
6. Close and re-open QuickBooks.

Once done, I recommend you create a new company or a sample file and check if you can set up and use the Godaddy email provider without any issues.

Here's how:

1. Click the File tab at the top menu bar.
2. Select Close Company.
3. Click Open a sample file or Create a new company. 

If it works, switch back to the affected company file and run the Verify Data and Verify Rebuild tools. These features in QuickBooks will help self-identify data issues within a company file and self-resolve them using Rebuild Data.

To run Verify Data:

1. Click the File tab at the top menu bar.
2. Hover your cursor to Utilities.
3. Select Verify Data.

Next, please run the Rebuild Data option through these steps:

1. Click the File tab at the top menu bar.
2. Hover your cursor to Utilities.
3. Select Verify Rebuild.

After following the recommended solutions, please restart your QuickBooks and set up the email again. You should now be able to get back on track with your invoicing process.

You can also check this article for more details about how to use the QuickBooks Tool Hub to repair QuickBooks: Fix common problems and errors with the QuickBooks Desktop Tool Hub.

Drop me a comment below if you have any other questions about the program features or emailing invoices. I'll be happy to help you some more.