exclude relay domains from unknown_domain check, but include into

After I finally understood what reject_unknown_recipient_domain does, I
want the following:
1. exclude my relay (and local delivery) domains from reject_unknown*
2. but include it into my anti-spam options.
3. use reject_unknown* only when a MUA contacts me

from my main.cf:
----------------
smtpd_recipient_restrictions =
reject_non_fqdn_sender
reject_unknown_sender_domain

permit_auth_destination
reject_unknown_recipient_domain

permit_mynetworks
permit_sasl_authenticated

reject_unauth_destination
check_helo_access hash:/etc/postfix/helo_checks

check_recipient_access hash:/etc/postfix/roleaccount_exceptions
reject_non_fqdn_recipient
check_recipient_access hash:/etc/postfix/recipient_checks
## check_sender_access hash:/etc/postfix/sender_checks
check_client_access hash:/etc/postfix/client_checks

reject_invalid_hostname
reject_multi_recipient_bounce

reject_rbl_client ix.dnsbl.manitu.net
reject_rbl_client relays.ordb.org
....

This will do (1.) by permit_auth_dest*, but will EXCLUDE my relay- and
local domains from any further anti_spam check ??
So , would it be a solution to completely re-order things, in that I
place anti-spam measures BEFORE permit_auth_destination ?

TIA,
Martin