Show HN: Klorn – an email firewall, not another AI assistant (open-source, self)
Klorn is an open-source, self-hosted email firewall designed to filter and protect email from spam, phishing, and malicious content. Unlike AI-based email assistants, Klorn focuses purely on security and control, allowing users to define custom rules and block threats before they reach the inbox.
Background
- Klorn is an open-source, self-hosted "email firewall" — a filter that blocks spam and phishing at the network level (during SMTP handshake), before messages reach your inbox. This is different from an AI email assistant that reads and summarizes already-delivered mail.
- Posted on Hacker News ("Show HN") by GitHub user k08200. HN is a tech-news forum run by Y Combinator where developers showcase new projects.
- Self-hosted means you run it on your own server, unlike cloud services like Proofpoint. This appeals to privacy-conscious users and organizations wanting full control over email security.