Mail App
My mail app automatically logged me out and when I go to log back in with my iCloud e-mail it is saying that e-mail is already added to my account.
don’t know what to do or how to log back in! Please can someone help?
The mail application quits from Mac suddenly , repair disk permissions Repair a storage device in Disk Utility on Mac - Apple Support
If an app freezes or quits unexpectedly on Mac - Apple Support
For iPhone - If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support