cPanel Fix Possible Mailbox Corruption Error Message

Issue: A user is unable to access their email, instead they receive a message as the example below:

Unexpected condition from IMAP server, closed or corrupt connection to IMAP. Possible mailbox corruption.

Often this is the result of a corrupt dovecot.index file.

Server logs located at /var/log/maillog will likely display lines such as the below:

dovecot: pop3([email protected]): Warning: fscking index file /home/username/mail/

Users of Microsoft Outlook will see errors that reference: Outlook Error 0x8004210A

Solution: Remove the file so that it is automatically recreated.

SSH into server.

Navigate to:

cd /home/username/mail/

Search for dovecot.index

Rename it:

mv dovecot.index dovecot.index-corrupt

Log back into email and the index file will be recreated.

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