Mine

#**# RBL List Begin
#**#
#
# Always accept mail to postmaster & abuse
#
accept domains = +local_domains
local_parts = postmaster:abuse
#
# Check sending hosts against DNS black lists.
# Reject message if address listed in blacklist.
deny message = ${sender_host_address} is listed at ${dnslist_domain}; See ${dnslist_text}
!hosts = +relay_hosts
!authenticated = *
dnslists = zen.spamhaus.org : bl.spamcop.net
!domains = +local_domains
#**#
#**# RBL List End