The spinning wheel disappeared. For no reason. It used to show opposite my inbox, in the left hand box with all my Emails and Folders, to indicate the program was working and searching for new Mail. I found it comforting! How do I get it back? Thank you. Michael.
In your Mail application go to the Mail's menu item 'Win dow' and in the drop-down select 'Connection Doctor'. Make sure it gets all green dots on communication with your email servers. To see the connections to the server in detail click on the 'show detail' button and then click 'Check Again'. This is a great tool to see if your connecting good to your email servers in detail. It will help you trace down email server problems.