Mine
public text v1 · immutable/etc/postfix/main.cf:
smtpd_restriction_classes = restrictive, permissive
restrictive = smtpd_helo_required = yes
permissive = permit
smtpd_recipient_restrictions =
regexp:/etc/postfix/recipient_access
/etc/postfix/recipient_access:
/^bla\.ru$/ permissive
/^bla1\.ru$/ restrictive
/^bla2\.ru$/ restrictive