Open Source Spam Filtering
Fast, Free, Efficient Email Protection
Rspamd is a fast, free and open-source spam filtering system with cutting-edge filtering technology, high performance and precise spam detection.
Key Advantages
Blazing-fast performance, flexible configuration, and powerful filtering
Lua scripting & flexible rules
Rspamd can process up to 100 messages per second on a single core, outperforming other spam filters by a significant margin.
Premium — Operational Dashboard
Rspamd Console. The decisions your logs can't show.
Detection impact analysis, symbol introspect, mail stream capture, and LLM-assisted rule authoring — drop-in next to your existing Rspamd cluster.
Explore Rspamd ConsoleKey Features
Powerful Open Source Spam Filtering
Rspamd provides state-of-the-art spam protection with a focus on performance, flexibility and ease of use. Leveraging AI, machine learning, and advanced analytics for comprehensive email security.
Advanced Protection
Multi-layered filtering including SPF, DKIM, DMARC validation, URL blocklists, pattern detection, and machine learning techniques.
AI & LLM Integration
Integrate with OpenAI or local Ollama models via the GPT plugin for intelligent spam assessment, and use LLM embeddings in the neural network module for content-based classification.
High Performance
Written in C with event-driven architecture, capable of processing up to 100 messages per second per core on modest hardware.
Advanced Analytics
Powerful data analysis with ClickHouse and Elasticsearch integration for deep insights into email patterns and threats.
Easy Integration
Works with major MTAs including Postfix, Exim, Sendmail and has native support in many mail server solutions.
Web Interface
User-friendly web interface for monitoring, configuration and checking message status in real time.
Statistical & Neural Filtering
Built-in Bayes classifier with multiclass support and a neural network module that learns from your traffic to adapt over time.
Extensible Architecture
Modular design with plugin support and Lua scripting for creating custom rules and integrations.
Comprehensive Documentation
Detailed user guides, configuration examples, and development resources to help you get the most out of Rspamd.
Open Source
Community-Driven Development
Rspamd is 100% free and open source software released under the Apache 2.0 license. Join our community of contributors and users helping to make email safer for everyone.
Powerful Core Features
Benefit from years of development with comprehensive spam filtering capabilities, including content analysis, RBLs, SPF, DKIM, DMARC, and much more.
ClickHouse & Redis Integration
Store and analyze large volumes of email metadata using ClickHouse integration, and benefit from high-performance Redis backend for caching and data storage.
Web Interface & Advanced Tooling
Manage your installation through an intuitive web interface and leverage advanced tooling for configuration, monitoring, and fine-tuning of spam filtering rules.
Antivirus Engine Support
Seamlessly integrate with popular antivirus engines to enhance email security and detect malicious attachments before they reach users' inboxes.
Personal Settings & Customization
Tailor Rspamd to your specific needs with extensive personalization options, custom rules, and per-user settings for optimal filtering performance.
Project Statistics
Rspamd is regularly updated with the latest spam-fighting techniques and security patches. The project is driven by both community contributions and professional developers.
Buy Rspamd Premium
By using commercial support, you directly sponsor and encourage Rspamd development as an Open Source project. Get enhanced features, priority support, and exclusive access to premium fuzzy databases.
Customer Stories
Trusted by Security-Conscious Organizations
See why IT security leaders choose Rspamd Premium for their critical email infrastructure.
"Rspamd's performance can only be compared with some extremely expensive brands available on the market. Beyond that, it has a wealth of powerful features and algorithms that make it an amazing tool against spam and other email abuse. Rspamd is broadly customizable and allows multiple strategies to avoid spam and false positives. In conclusion, the Rspamd team not only gives incredible support to Locaweb but has also been a great partner."
Rafael Abdo
Computer Security Incident Coordinator, Locaweb
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