[Dovecot] Dovecot LDA and Postfix/local for local users.

Hello, I would like to configure dovecot lda for local users. My dovecot vesion is 1.2.15. Dovecot documentation for System users says that only thing I should add to main.cf is:

mailbox_command = /usr/local/libexec/dovecot/deliver (path to deliver)

After that should I commented postfix/local process from master cf ?

regards, Jarek