From The System Administrator Zone

Email account space hogs

du -ch --max-depth=1 /var/qmail/mailnames/*/ | sort -nr |more

How do you customize an include file?

Place a file with your apache options, named vhost.conf, in the conf directory for the domain.

/usr/local/psa/admin/sbin/websrvmng --reconfigure-vhost --vhost-name=

Then check apache for problems:

service httpd configtest

If no problems, restart apache:

service httpd restart

Default installation leaves you running an open mail relay.

Check Server > Mail

Plesk ships with a default of It leaves you with an open relay. If you have the /8 subnet mask there, remove that one and replace it with The /32 subnet mask will still allow scripts to send mail from the server, but will close your relay for you.