
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.

SQL powered operating system instrumentation, monitoring, and analytics.

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

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

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

Open-source antivirus engine for detecting trojans, viruses, and malware via signature-based scanning; includes a daemon, on-demand CLI, and…

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server…

Open .eml test set for evaluating how email security controls and AI mailbox assistants handle indirect prompt injection across disclosure,…

Defensive detection kit for CVE-2026-76461, a critical SQL injection in Cisco Secure Email Gateway, with Sigma and YARA rules, IOCs, and remediation…

amavis is a high-performance email content filter framework written in Perl.

Ruby library implementing the SAML Service Provider side of SSO, handling authn requests, response validation, XML signature checks, and IdP metadata…

Minimal unikernel firewall for QubesOS that filters network traffic, implements NAT, and communicates via Qubes DB and qrexec.

Defensive engagement & threat intelligence research laboratory. Converts inbound scam emails into actionable IOCs through controlled, policy-driven…

Read-only WordPress security scanner for HestiaCP servers. Detects wp2shell compromise indicators (CVE-2026-63030 / CVE-2026-60137) across all hosted…

iptables-based stateful firewall with human-friendly configuration and optional QoS (FireQOS) for bandwidth management.

Security hotfix for CVE-2017-8802