Hi there, @KateM7.

The message that you received can be caused by Google's recent update for the privacy policy. To resolve this email issue, you'll need to reauthorize QuickBooks Desktop and continue using Gmail.

Before doing so, make sure to have the latest release of QuickBooks Desktop.

Once confirmed, you may now perform these steps below:

1. From any open transaction or report in QuickBooks, select Email.
2. Hit Send, you'll prompted to log in with your Intuit credentials.
3. Press Continue in the Webmail Authorization window that opens.
4. Click Allow.

For more information about this process, kindly visit this link: Reauthorize QuickBooks Desktop to keep using Gmail.

If doing this doesn't make a difference, I suggest getting in touch with our Customer Care Team. They can initiate a remote-viewing and help determine the main reason of this issue.

To contact them:

1. Go to the Help menu.
2. Choose QuickBooks Desktop Help.
3. Tap the Contact us button.
4.  
5. I'm just a comment away if you have any other concerns. It'd be my pleasure helping you out. Take care!