This is a quote from postfix mailing list discussion made by Justin Piszcz:

I have done some extensive testing with all of the RHSBLs I could find that
still work (39):

abuse.rfc-ignorant.org
adv.rhs.mailpolice.com
badconf.rhsbl.sorbs.net
ban.zebl.zoneedit.com
bl.deadbeef.com
block.rhs.mailpolice.com
bl.open-whois.org
bogusmx.rfc-ignorant.org
bulk.rhs.mailpolice.com
cart00ney.surriel.com
dnsbl.antispam.or.id
dnsbl.cyberlogic.net
dnsbl.isoc.bg
dnsrbl.swinog.ch
dnswl.isoc.bg
dnsbl.othello.ch
dob.sibl.support-intelligence.net ** bad (.org issue)
dsn.rfc-ignorant.org
dynamic.rhs.mailpolice.com
endn.dnsbl.net.au
ex.dnsbl.org
fraud.rhs.mailpolice.com
in.dnsbl.org
jwrh.dnsbl.net.au
l1.apews.org
multi.surbl.org
multi.uribl.com
nomail.rhsbl.sorbs.net
orid.dnsbl.net.au
porn.rhs.mailpolice.com
postmaster.rfc-ignorant.org
rddn.dnsbl.net.au
rhsbl.ahbl.org
rhsbl.sorbs.net
spamdomain.block.transip.nl
uribl.swinog.ch
webmail.rhs.mailpolice.com
whois.rfc-ignorant.org
zebl.zoneedit.com

The best, most useful and safe are as follows:

black.uribl.com
multi.surbl.org
multi.uribl.com
rhsbl.ahbl.org

These are the top four I have come across, while some may experience false
positives, I have yet to notice any with these.

reject_rhsbl_helo black.uribl.com,
reject_rhsbl_sender black.uribl.com,
reject_rhsbl_client black.uribl.com,
reject_rhsbl_helo multi.surbl.org,
reject_rhsbl_sender multi.surbl.org,
reject_rhsbl_client multi.surbl.org,
reject_rhsbl_helo multi.uribl.com,
reject_rhsbl_sender multi.uribl.com,
reject_rhsbl_client multi.uribl.com,
reject_rhsbl_helo rhsbl.ahbl.org,
reject_rhsbl_sender rhsbl.ahbl.org,
reject_rhsbl_client rhsbl.ahbl.org

For more agressive checks on other domains, I may use:

reject_rhsbl_client bogusmx.rfc-ignorant.org,
reject_rhsbl_helo bogusmx.rfc-ignorant.org,
reject_rhsbl_sender bogusmx.rfc-ignorant.org,
reject_rhsbl_client dsn.rfc-ignorant.org,
reject_rhsbl_helo dsn.rfc-ignorant.org,
reject_rhsbl_sender dsn.rfc-ignorant.org

Or to be extremely agressive:

reject_rhsbl_client bl.open-whois.org,
reject_rhsbl_helo bl.open-whois.org,
reject_rhsbl_sender bl.open-whois.org,

reject_rhsbl_client uribl.swinog.ch,
reject_rhsbl_helo uribl.swinog.ch,
reject_rhsbl_sender uribl.swinog.ch,

reject_rhsbl_helo dnsbl.othello.ch,
reject_rhsbl_sender dnsbl.othello.ch,
reject_rhsbl_client dnsbl.othello.ch

Justin.

Working RHSBLs

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