Plesk GUI Subscriptions > example.com > Statistics shows overuse by mail.
In Plesk GUI Domains > example.com > Email Addresses usage is normal.
Checking mail disk usage on the server shows different disk space usage from the one showed in Plesk GUI, e.g.:
# du -sh /var/qmail/mailnames/example.com/
Checking mail disk usage on the server with the command including hardlinks shows the same disk usage as in Plesk GUI:
# du -shl /var/qmail/mailnames/example.com
The most part of disk usage belong to one directory, e.g.
# du -shl /var/qmail/mailnames/example.com/user/Maildir/.Spam/tmp
Directory size differs when checking not counting hardlinks:
# du -sh /var/qmail/mailnames/example.com/user/Maildir/.Spam/tmp
There are numerous hardlinked files under
/var/qmail/mailnames/example.com/user/Maildir/.Trash/cur in the mailbox. These files are counted as separate files for the purposes of disk usage statistics.
Connect to the server via SSH.
# rm -rf /var/qmail/mailnames/example.com/user/Maildir/.Trash/cur/*
# rm -rf /var/qmail/mailnames/example.com/user/Maildir/.Trash/tmp/*
# rm -rf /var/qmail/mailnames/example.com/user/Maildir/.Spam/*
- Recalculate disk usage statistics