[Dovecot] maildir creation

[Renzetti Federico]

Hi all,
this is my first post to the list and sorry for my english.
I have a mail server based on qmail+dovecot+ldap with virtualdomains and 
maildir stored in /var/vmail/<DOMAIN>/<USERNAME>/Maildir.
When I create a user on LDAP I don't create maildir too.
So if I log-in with dovecot (143,110) I hope dovecot creates maildir for 
users but this is not I get: maildir are not created...

dovecot.conf
....
default_mail_env = maildir:/var/vmail/%d/%n/Maildir
....

There is a way to create automatically maildir for users?
Thanks all.

-- 
Renzetti Federico

System/Network Administrator
RedHat Certified Engineer

Fabaris S.r.l.
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