Drag the com. mail folder on the Desktop. Depending on how you have your Mail app displayed normally, you may need to reset some of your display settings. It will reset to the default view.
Q. How do I restart Apple Mail?
Restart Mail app Press Option-Command-Esc to open the force-quit menu. Select Mail to quit the app. Then reopen the app and see if the issues disappeared.
Q. How do I open Mail Connection Doctor on Mac?
Use Connection Doctor in Mail on Mac
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