I want to ensure this is taken care of, @Civil. Let me share additional information on how emailing paystub works in QuickBooks Desktop. 

We can perform a few troubleshooting steps to get rid of the unexpected behavior. First, let's make sure QuickBooks Desktop is at its latest release. The system provides maintenance releases and product updates to patch and fix unexpected behavior and other issues.

The user should be an admin to update QuickBooks Desktop. However, you can set up QuickBooks to automatically download the updates.

Let me show you how:

1. Click the Help menu at the top, and select Update QuickBooks.
2. On the Update QuickBooks window, go to the Options tab.
3. To turn on Automatic Updates, select the radio button for Yes (see the first screenshot).
4. To share automatic downloads with other computers on your network, select the radio button for Yes.
5. Select Mark All, then click Save.
6. Click the Update Now tab.
7. Tick the Reset Update button.
8. Click Get Updates (see the second screenshot).
9. Restart QuickBooks. When prompted, accept the option to install the new release.

Once done, close and reopen QuickBooks. Let's also run the payroll tax table update.

Here's how:

1. Click Employees.
2. Choose Get Payroll Updates.
3. Select the Download entire payroll update radio button.
4. Click Update.
5. Wait until the update is complete.

However, if the issue persists, we can run the Verify/Rebuild tool utility to detect the data damage: Verify and Rebuild Data in QuickBooks Desktop.

Lastly, I'm also adding this article again so you can see steps on how you can fix issues about employees having issues seeing or opening your emails: Email pay stubs from QuickBooks Desktop.

If you need additional assistance with payroll, please let me know so that I can help.