This morning I am unable to retrieve mail from my ISP and I have an "Account Error" advisory at the top of my Apple Mail page - in a little black triangle. The Preferences show that iCloud is online but I cannot get it to go offline and allow my ISP mail to be online.
Every time I designate my ISP account as the online account, iCloud takes over and designates itself as online.
Solution?
NOTE: My wife's ISP email, on the same machine but a different account, is just fine.
Update: I used Cocktail to rebuild the Launch Services Database, but that made no difference.
Update 2: And now, just as mysteriously as the problem arose, it has gone away. I went to fill my coffee mug and, when I returned, Mail had started working properly. Colour me confused, albeit relieved.
Last edited by ryck; 12/09/19 01:53 PM.