I have two ISPConfig server running Debian 4, both with perfect install. On one server I find this in /etc/postfix/main.cf: mailbox_command = procmail -a $EXTENSION Why is this there? Should I remove this or add it on the other server? On the other server there's this line: home_mailbox = Maildir/ After adding this line on the first server Webmin shows the correct mailbox size, which is good for me. But why is there a difference? thanks.