
spamassassin
Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.
defensive-toolsemail-securitymachine-learning+1
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Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Open Cyber Threat Intelligence Platform

MISP (core software) - Open Source Threat Intelligence and Sharing Platform

Open source platform for cyber security analysts with many features for threat intelligence and detection engineering.