Greylisting of suspicious source (exported from code.google.com/p/gross)

ThunderSec is a security plugin for Mozilla Thunderbird that creates several pieces of additional security functionality, including DNSBL, RBL, SURBL, DKIM and SPF.

Library and toolset for checking realtime blackhole lists

Minecraft Open Proxy Monitor

Archive copy of Stan Hoeppner's Postfix PCRE bot spam killer (fqrdns.pcre)

Milter for filtering emails according MAIL FROM domain.

Check if IP has blocked with postscreen DNSBL

Check if an IP is blacklisted in DNS BL

Protect your IP addresses from blacklists and abuse

gaw.sh url shortener

Simple query DNS-based blackhole lists

Email Spam Filter Service

Miscellaneous scripts to gather statistics from postfix

DNSBL (DNS-Based Black List) checker.

Which .gov.uk domains are on DNSBL's

The script checks the specified IPs against Spamhaus DNSBL DB via standard DNS protocol and sends alert to the specified addresses in case any of the IPs have been blacklisted.

Prometheus exporter for checking domains listed on blacklists

Laur Hosts is a personal blacklist hosts with bad domains from the internet what should be avoided from being accessed.

RBL check script is use to check IP is blacklisted on the list of DNSBL Servers...

My Smart-TV Blocklist