Control Panel -> Email -> Add/Remove/Manage Accounts -> Show Disk Space Used

When there are inconsistencies with Cpanel’s email disk space usage, you should verify the actual disk space being utilized by:

(1)

du -sh /home/username/mail/userdomain.com/user/
tail -1 /home/username/mail/domain.com/user/maildirsize

(2) Compare the utilized disk space reported by the first du command with the bytes shown in the user’s maildirsize file. If the totals reported are different delete or rename the maildirsize file (/home/username/mail/domain.com/user/maildirsize). Next, logout and then back in again within the user’s control panel and go to Control Panel -> Email -> Add/Remove/Manage Accounts -> Show Disk Space Used