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⇱ Rspamd 4.0 Released For Open-Source Spam Filtering - Phoronix


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Rspamd 4.0 Released For Open-Source Spam Filtering

Written by Michael Larabel in Free Software on 30 March 2026 at 09:17 AM EDT. Add A Comment
Rspamd 4.0 is out today as a big update to this powerful open-source spam filtering system.

Rspamd 4.0 introduces external pre-trained neural / large language model (LLM) embedding support, /checkv3 multi-part protocol support, a pluggable async Hyperscan cache, multi-flag fuzzy hashes, HTML fuzzy phishing detection, HTTPS server support for workers, and a new built-in fast text shim that can provide ~500MB to 7GB in memory savings.'

Rspamd 4.0 also adds brings improvements to its GPT module, ASCII85 decode support, HTTP content negotiation, Reply-To validity checks, Zstd compression with the structured metadata exporter, and token bucket load balancing support. Plus bug fixes and other enhancements.

👁 Rspamd logo


Downloads and more details on the big Rspamd 4.0 release via GitHub.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.