How to activate postfix Quota?

[waweiwi]

Hi, All,

I just finished installing fresh ispcp, configured everything according to web documentation, added my first user and added the first domain assigned disk usage to this domain.

I uploaded files and sent and received email still I exceeded the disk limit that I set but after that I still send and receive email, how it come!!!!! I exceeded the limit.

Is there are steps to activate quotas for postfix or I need to go somewhere else.

BR
Walid Aweiwi