postfix sender-specified routing

[paublo]

hi im trying to stop trusted clients from sending sender-specified routing such as test@test.com@relayhost.com.

i have the following

smtpd_recipient_restrictions = permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unknown_recipient_doma
in, check_recipient_access regexp:/etc/postfix/recipient_regexp, permit_mynetworks, reject_unauth_destination

and in /etc/postfix/recipient_regexp

[%!@].*[%!@]/ 550 Sender-specified routing rejected


so far when i test this it doesnt seem to work.

should this be all i need ?