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macrumors 65816
Original poster
Ever since macOS Catalina has been out I have not been able to Mail I keep getting the pop-up error messages saying Mail quit unexpectedly, is there a workaround for this
 
Disable all the Mail accounts in System Preferences > Internet Accounts, make sure Mail launches with no accounts active. Then re-enable them one at a time. It'll either start working, or you'll identify which account is causing the problem and deal with that separately.
 
Curious if you are using Gmail? I found that I had to disable my Gmail accounts, but Exchange works okay.
 
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