Rspamd 2.5
Rspamd is an advanced spam filtering system featuring support for various internal and external filters such as regular expressions, suffix tries, RBLs, URL black lists, IP lists, SPF, DKIM, character maps, advanced statistics module (based on OSB-Bayes algorithm) and fuzzy hashes database that is generated based on honeypots traffic. Rspamd is designed to process hundreds of messages per second simultaneously without significant CPU load.