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
Another anti SPAM solution again
Today I went through the “Finally blocking some spam” titled conversation on the postfix mailing list. While I do not like the main idea of this discussion at all, e.g. blocking SMTP connections on the firewall level by whole IP