Since the latest Comcast email "upgrade," I frequently get the attached error messages when Outlook (on Mac) accesses my Comcast email. In addition, my Comcast emails sometimes disappear from my Outlook Inbox where I also receive emails from other email accounts not connected to Comcast), then show up again the next time Outlook receives email (my Outlook is set up to receive email every ten minutes). Email from any of my other accounts never disappears from the Outlook Inbox. Can anyone explain this? Better yet, fix it? With a "normal" email account, I would just downgrade and stop the problem, but the upgrade is done by Comcast on their end, so that's not a solution.