Mac Mail "Downloading Messages " thousands mails always on startup

Running

macOS Big Sur 11.2.3 (20D91)


An odd issue has arisen wherein my Mac Mail is constantly displays a "Downloading Messages" message when no new emails are being downloaded. It often displays that several thousands messages are being downloaded.


PS

I tried trick with sorting draft "On My Mac" in "Mailbox Behaviours", didn’t help and starting Mail app with shift as well.


Thank you for help.


MacBook Pro 13″, macOS 10.15

Posted on May 10, 2021 11:53 AM

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Posted on May 10, 2021 7:05 PM

It will show that message when it rebuilds the database it uses to index the raw messages.

It probably has a corrupt index that keeps getting rebuilt.

You can try to delete the index and let it create a new one.

Quit Mail and delete the Envelope Index files inside of ~/Library/Mail/V8/MailData. ~/ means your home folder. If your user library is hidden, hold down the Option key and select Library from the Go menu in Finder.

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Question marked as Top-ranking reply

May 10, 2021 7:05 PM in response to extraktem

It will show that message when it rebuilds the database it uses to index the raw messages.

It probably has a corrupt index that keeps getting rebuilt.

You can try to delete the index and let it create a new one.

Quit Mail and delete the Envelope Index files inside of ~/Library/Mail/V8/MailData. ~/ means your home folder. If your user library is hidden, hold down the Option key and select Library from the Go menu in Finder.

May 12, 2021 6:48 AM in response to extraktem

Sorry, I forgot to mention that you will get the downloading messages while it reindexes the messages, but it should stop repeating, maybe.


Given that it got stuck, that is likely the problem message. I don’t know if there is a way to determine where it is hanging up. If you can, manually moving that raw message might let it complete and stop repeating.

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Mac Mail "Downloading Messages " thousands mails always on startup

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