[Dovecot] dovecot + vpopmail

I was just wondering how dovecot interacts with vpopmail. Does it just call the vchkpw and pass the username and password to it then wait for a it to tell dovecot weather the user is vaild or not ? Does vchkpw pass back the users homedir ?

PS. My plan is to just replace vchkpw with a script/program of own. that dovecot can call to auth a user again xmail passwd file. And using "auth_passdb = static uid=<uid> gid=<gid> home=<dir template> mail=<dir template>" to fill in all the holes.

-- Chris L. Franklin --