SecZim
SecZim is an email security policy server for Zimbra
What it does
SecZim is a policy server for Zimbra and Postfix that enforces security rules at the SMTP layer — SPF checks, geo filters, greylisting, rate limits, and adaptive blacklisting — blocking threats before they reach your mail server. A web dashboard lets you monitor traffic in real time and apply policies in a few clicks. No changes to your existing infrastructure required.
Does the same job
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A fast SOCKS5 proxy that tunnels your traffic through what looks like normal SMTP email, bypassing Deep Packet Inspection firewalls. How it works: - Client runs a local SOCKS5 proxy (127.0.0.1:1080) - Traffic is sent to server disguised as SMTP (EHLO, STARTTLS, AUTH) - DPI sees legitimate email session, not a VPN/proxy Features: - One-liner install on any Linux VPS - Multi-user with per-user secrets and IP whitelists - Auto-generated client packages (just double-click to run) - Auto-reconnect on connection loss - Works with any app that supports SOCKS5 Tech: Python/asyncio, TLS…
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This is a tool to manage encrypted local backups of secrets. The core idea is that it aims to be usable without depending on it, meaning that even if the software disappeared from the face of Earth tomorrow, your data would still be recoverable. It also integrates nicely with NixOS (which is what I use, though it does not require NixOS to be used). I have summed up a bit of explanation and some answers to reasonable questions in a blog post: https://baldino.dev/blog/secs-man/
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