I am now concentrating on enable the maildirquota using courier authdaemon -
authmysql. According to Sam, we should start the project at /userdb/userdb.* coz
the maidirquota is successfully enabled using authuserdb. _But_, after I have viewed the source codes of userdb auth mode, I am really
lost coz there got to be too much for me to do that I really do not know where
and how to start. Anybody can help me solve the problem or tell me if you were in this situation,
what would you do then? Now I simply have successfully read the maidirquota in mysql database and put
the quota number into environment. But How I can let maildrop to read the
environment to enforce and calculate the quota.

Thank You