Global Space Limit
I think that a global space limit per user should be something ispconfig must have. Right now, I offer (for example) 1GB of hosting, but I am assigning 500MB to site and 500MB to mail... if the user wants to use 800MB for site and just 200MB for mail, well, I have to modify values for the client.
In my case, if a "global space limit" exists, I just could set it to 1GB, and same value for site/mail, and the user will never use more than 1GB, and he will have the freedom he wants with his space.
Is it possible to implement this?