Incorrect mail resource usage

[KamilR]

Hi,
I found a strange bug in Plesk. One of my subscriptions has no mailboxes, but the daily usage script shows 8.48 GB used by mail. What could be the problem?

 

[IgorG]

What do you mean "daily usage script"?
Where you see this 8.4Gb?

 

[KamilR]

By daily usage script I meant the script that computes disk space usage every day: /opt/psa/bin/sw-engine-pleskrun /opt/psa/admin/plib/DailyMaintainance/script.php >/dev/null 2>&1

The disk space usage is shown on the Statistics tab in the Control Panel: http://img850.imageshack.us/i/plasmadesktopid1908.png/
There are no mailboxes configured.