[Dovecot] Maildir/mbox on a per-user basis

[Jon Nathan]

Hello,

The Wiki indicates that Dovecot can do either mbox or Maildir on a
per-user basis:

default_mail_env can be overridden in userdb for each user. This works
with userdbs supporting the "mail" attribute (eg. passwd-file, SQL,
LDAP).

How exactly does one do this for passwd-file?  

Thanks,


-Jon

-- 
Jon Nathan
jon at rupture.net