Vendors

Open source spam filtering system with advanced features

Open-source anti-spam platform providing email filtering using heuristic analysis, Bayesian filtering, and DNS blocklists

Open source email archiving and compliance solution with enterprise features

Open source email security system for Linux-based email gateways protecting against viruses, spam, phishing, and malware

Open-source email filtering framework that works with Sendmail's Milter API to provide customizable mail filtering in Perl.

High-performance interface between mailer (MTA) and content checkers like spam and antivirus scanners

Comprehensive email security solution protecting against spam, malware, and advanced threats with AI-powered detection.

Commercial email security solution for small and medium-sized businesses

Cloud-based advanced email security platform protecting against sophisticated email attacks, malware, and data loss.

Open source email security solution that protects against spam, viruses, and malware