SecZim – Email security policy server for Zimbra and Postfix

Summary: SecZim enforces security policies at the SMTP layer for Zimbra and Postfix servers, including SPF checks, geo filtering, greylisting, rate limiting, and adaptive blacklisting. It blocks threats before they reach the mail server and provides a web dashboard for real-time traffic monitoring and policy management without infrastructure changes.

What it does

SecZim applies security rules such as SPF verification, geo filters, greylisting, rate limits, and blacklist management at the SMTP layer. It offers a web dashboard to monitor traffic and configure policies quickly.

Who it's for

It is designed for sysadmins managing Zimbra and Postfix mail servers who need to automate security hardening and threat mitigation.

Why it matters

SecZim reduces manual effort and exposure to spam, brute-force attacks, and misconfigurations by enforcing tailored security policies before threats reach the mail server.