[Dovecot] Configuring for virtual users

I haven't tried this yet; however, I would like to know if it would work.

Using Postfix, I am setting up numerous virtual users. These users obviously do not have an account on the mail server. I have created a "domain.net" account. Assuming that Postfix is properly set up to deliver to the specified accounts, which will be held under the "domain.net" directory, will this work in the dovecot.conf file:

#   default_mail_env = maildir:/var/mail/%d/%u

or do I need to modify it somehow?

-- Gerard