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Big Sur Mail Account creation fails: This account already exists

Running a MacBook since years without using a mail application. Instead, use web mail since years, including mail app on the iPhone.


Updated to Big Sur and want to use mail app. Added a Mail account for IMAP mailing, but it didn't work. 'Connection Doctor' was not able to fix it, so I removed this Mail account in 'Internet Accounts'.


While I use the same mail address for Apple ID I signed out, restarted the Mac, and tried several times to 'Add Mail account' via Mail app or directly via System Preferences - Internet Accounts.


Imagine what the error message is: 'This account already exists.'


How can this be fixed if Apple ID/iCloud signing out is not working? Thank you so much.

MacBook, macOS 11.1

Posted on Feb 1, 2021 2:39 AM

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Posted on Feb 1, 2021 6:15 AM

Solved my problem: Just deleted all other 'Internet Accounts' entries in the list I had and could create my IMAP mail account.

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Big Sur Mail Account creation fails: This account already exists

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