Matteo Corti Elan Ruusamäe (improved parallel support and several fixes) Victor V Kudlak (parallel support) Jan Kantert for the whitelisting support Nick Nicholas for IPv6 support Michael Orlitzky for the test.sh usage patch Celevra https://github.com/celevra for the Debian/Ubuntu documentation update Claudio Kuenzler https://github.com/Napsty for the append patch Please report any bugs or feature requests through the web interface at https://github.com/matteocorti/check_rbl/issues