I have fully functional mail server which uses maildrop as a delivery agent. Now i need to implement quota for each mailbox. I've found some articles which describes quota configuration with patch to postfix - but i found some posts that patched postfix quota functionality works only when virtual delivery agent is used. So its useless for me.
Is there any better way to implement mail quota rather than manual maildir size checks in maildrop scripts?
Quota settings will be stored in a database (as all settings - its virtual user environment)
Using dovecot is not a solution (like: how to repair car -> buy a new one...)