SPAMfighter software (version 7.6.179) is an anti-spam tool that integrates with various email clients such as Microsoft Outlook, Outlook Express, Windows Mail, and Thunderbird. Its most important features include advanced spam filtering, real-time Blackhole List (RBL) checks, language filtering, and whitelist/blacklist options. It also offers a user-friendly interface and automatic updates to stay up-to-date with the latest spam threats.