This issue is not related to a specific email address. We tried many different addresses that we have access to and found that the email Autoaction is no longer sending email to BCC or CC addresses, even thought the registered user is getting the emails.
After much experimentation it turns out that by having "Content Plugins" set to "Yes" under the paramaters tab is the culprit. If we set this to "No", then emails send to CC and BCC addresses.
Since we have had this set to "Yes" from the time we originally created these Autoactions and they worked as intended and then they suddenly stopped working, there must be some change on that side that caused the "Content Plugins" set to "Yes" setting to interfere with sending mail using the email Autoaction?