Postfix block with smtpd_recipient_restrictions

SYSTEM INFORMATION
OS type and version Ubuntu Linux 22.04.3
Webmin version 2.105
Usermin version 2.005
Virtualmin version 7.8.2
Theme version 21.09.5
Package updates All installed packages are up to date

using /etc/postfix/main.cf
smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/sender_access,permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination

however, whilst the sender_access exists, and is postmapped ok (with postmap /etc/postfix/sender_access)
…, it is being ignored, i.e nothing blocked !
is this a problem with the other settings here in smtpd_recipient_restrictions ?

thanks, appreciate your time.

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