- Plesk 12.5 for Linux
- Plesk Onyx for Linux
The usage of mailbox space differs between Plesk and mailbox directory on a server.
In Plesk > Subscriptions > example.com > Mail tab mail Usage shows 100MB.
But on the server the mailbox directory size is:
# du -schl /var/qmail/mailnames/example.com
Refreshing mail usage by clicking Refresh Usage Stats at Plesk > Subscriptions > example.com > "Mail" tab does not solve the issue.
If update is not possible for some reason you may try the following
Upgrade to the latest version using Plesk Autoinstaller.