Postfix - rejecting unknown local users.

Hi,

I believe there is a simple solution to my
problem however I possibly can't find it :/

What I want is to have postfix accept mail
for non-existent local recipient and then in the
second phase reject it with a proper info
to local sender.
Default postfix behaviour is to block
such messages when one's trying to send them.
Here's what I've found in docs:
(..)
To disable the local_recipient_maps feature, specify:

/etc/postfix/main.cf:
local_recipient_maps =

With this setting, the Postfix SMTP server will not reject mail for
unknown local recipients.
(..)
Well, it ain't work. I've also tried combinations
with luser_relay setting such as:
luser_relay = $user@local.domain.com
or
luser_relay = $recipient@local.domain.com

No luck, here.
Maybe this got sth to do with my sasl config,
but I couldn't google it out:

smtpd_client_restrictions = hash:/etc/mail/access
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_mynetworks,
reject_maps_rbl,
check_client_access hash:/etc/mail/access,
check_sender_access hash:/etc/mail/access,
permit_sasl_authenticated,
check_relay_domains

smtpd_sender_restrictions = reject_unknown_sender_domain,
check_sender_access hash:/etc/mail/access

Thanks for any clues.

PeDe