SecZim

SecZim is a high-performance, fully on-premise email security server purpose-built for Zimbra and Postfix mail infrastructures. It gives organizations complete control over their email security without ever sending data to third-party clouds — everything runs on your own servers, so your data never leaves your infrastructure. Designed for IT teams, enterprises, and managed service providers, SecZim combines powerful protection with a modern, intuitive web dashboard that makes complex mail security manageable. From a single admin interface, you can monitor traffic in real time, enforce granular security policies, and respond to threats as they happen. Core capabilities include:

Advanced security policies — granular, per-domain and per-user rules for both inbound and outbound mail. Access control — per-module whitelisting and blacklisting with fine-grained configuration. Intelligent greylisting — adaptive greylisting that learns from your real traffic patterns. Real-time monitoring — live session tracking, IP reputation scoring, and traffic analytics. Anomaly detection — automatic identification of unusual sending behavior and brute-force attempts. Rate limiting — configurable limits that protect your infrastructure from abuse and overload. Modern web dashboard — manage every module through a clean, easy-to-use admin panel.

SecZim integrates natively with Zimbra Collaboration Suite and Postfix, deploying directly onto your existing mail servers. It offers flexible licensing for small businesses, enterprises, and MSPs, and comes with a 15-day free trial that requires no credit card. A live demo and full documentation are also available. In short, SecZim is the email security layer that keeps your mail flow protected, monitored, and under your control — entirely on-premise.