wrbldnsd
wrbldnsd is a portable Windows packaging of Rbldnsd, bundled with Rsync and Cygwin to provide a ready-to-use local DNSBL server. It serves IP- and name-based blocklists from memory for fast, efficient spam filtering and supports automatic zone updates via Rsync. Runs as a secure Windows service with simple configuration.
This project is now hosted on GitHub with full documentation and releases.