Back In February 2019, while running Windows 7 and using Outlook 2010 as my email client, I successfully took the recommended steps to get a one-time code for OAuth and continued to get my emails through Outlook.
Now, I have recently upgraded my same computer to Windows 10 and upgraded my email client to Outlook 2013 with all data transferring seamlessly into Outlook 2013. I have been using it successfully for 2 weeks so I am now confused by the recent email from AT&T YAHOO stating that it is time to upgrade from my Classic email to their new version before October 10 or I will lose access to my email. Since they want me to click a link to proceed, I will not do that. And since the final sentence has a word missing, it does look like a phishing attempt. I would caution others to be wary, and I implore AT&T to alert their customers of this problem.