Hi Simon, Thanks for sharing this project. I am very interested in the approach, particularly the local fuzzy-hashing layer.
I plan to implement this in my system to see how it performs alongside my current setup. I will report back with feedback once I have some data. Best regards, Jimmy On Thu, Jan 15, 2026 at 7:04 PM Simon Bressier <[email protected]> wrote: > Hi everyone, > > Following a brief exchange with Giovanni Bechis, I’m reaching out to > this list to present an open-source project I’ve been developing: > Mailuminati Guardian. > > By way of background, I’ve been working in the anti-spam and > anti-fraud ecosystem for about 15 years, currently for the French > public mailbox provider laposte.net. > > What is Mailuminati Guardian? > > Guardian is a high-performance enforcement service designed to run > alongside your existing MTA and SpamAssassin setup. It is not meant to > replace SpamAssassin, but to complement it by providing a fast, local > fuzzy-hashing layer. > > It relies on TLSH (Trend Micro Locality Sensitive Hash) and LSH techniques > to: > > 1. Generate structural fingerprints of incoming emails. > > 2. Apply immediate local learning: When you or your users report a > threat, Guardian learns the structural "distance" and blocks similar > variants instantly without waiting for global rules. > > 3. Collaborate via the Oracle: It queries a shared global database > only when local proximity is detected, benefiting from > community-driven intelligence while preserving privacy (no raw content > is ever shared). > > Why I’m posting here > > I have developed an integration for SpamAssassin (and Rspamd/Dovecot) > and I am looking for experienced postmasters and developers from this > community to: > > • Beta test the integration: Validate the installer and the plugin’s > behavior in different environments. > > • Provide feedback: On the logic, the scoring, and the overall performance. > > • Discuss Perl implementation: Giovanni mentioned that a native TLSH > Perl implementation for SA could be an interesting path forward, and > I’d love to hear the community’s thoughts on this. > > The goal is to make our filtering stacks more resilient and benefit > from a shared experience, because as we all know, the more "email > geeks" we are, the more effective our defense becomes. > > Project Link: https://github.com/Mailuminati/Guardian > > If you have a bit of time to look at the code or test the > installation, your feedback would be invaluable. And if you like the > approach, feel free to star the repo to help with visibility! > > Looking forward to your thoughts and feedback. > > Best regards, > > Simon Bressier > > https://www.linkedin.com/in/simon-bressier/ >
