
spamassassin
Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Real-time malicious traffic detection system using public blacklists, static malware trails, and heuristic analysis to identify threats across DNS,…

Open Cyber Threat Intelligence Platform

Spam filtering and email processing framework with regex rules, statistical analysis, custom Lua plugins, and external blocklists for MTA integration.

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

SQL powered operating system instrumentation, monitoring, and analytics.

Sublime rules for email attack detection, prevention, and threat hunting.


Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Automation to assess the state of your M365 tenant against CISA's baselines

Spam Scanner is a Node.js anti-spam, email filtering, and phishing prevention tool and service. Built for @ladjs, @forwardemail, @cabinjs, @breejs,…

Open-source XDR and SIEM platform for threat detection, log analysis, file integrity monitoring, vulnerability assessment, and compliance management…

Paperweight scans your inbox to map your digital footprint, then helps you take back control and delete your data. Local-first and open source.

The exploit server for out-of-band findings. Point a target at a domain you own. Every HTTP request and every email it sends back lands in a…

Open-source network IDS/IPS/NSM engine for real-time traffic inspection, intrusion detection and prevention, protocol analysis, and rule-based threat…

Dockerized mail server suite with Postfix, Dovecot, Rspamd, and ClamAV. Provides secure email hosting with integrated spam filtering, antivirus, and…

mboxShell. Fast terminal viewer for MBOX files of any size. Open, search and export emails from Gmail Takeout backups (50GB+) without loading them…

A Python package and CLI for parsing aggregate and forensic DMARC reports