[Dovecot] auth_socket_path permissiones

Hello, I'm using dovecot 1.0 under debian etch.

The lda socket path is set to: auth_socket_path = /var/spool/postfix/private/auth

But this gives me the error: net_connect(/var/spool/postfix/private/auth) failed: Permission denied

I suppose deliver is run as dovecot user. I read about running deliver as root with the suid bit set. I'm not quite sure if this is a good solution. Is there any other way. In the wiki says: "Most MTAs won't let you run deliver as root, so for now you'll need to make it setuid root. However deliver isn't designed to be run as setuid-root"

My MTA is postfix, does someone know if postfix let me run deliver as root? If not, should I go to the setuid option?

Thank you.

-- Adrián Ribao Martínez