Rspamd

Fast, free and open-source spam filtering system.

Quick start

News: Rspamd 3.11.1 has been released

2025-03-10

New stable release is now available.

Learn more 

Study: Rspamd and GPT integration

2024-07-03

We have studied the efficiency of the new GPT plugin to access LLM (large language models) intelligence.

Learn more 

Performance 

Rspamd is designed to be fast and can process up to 100 emails per second using a single CPU core

Features 

Learn about the wide range of technologies supported by Rspamd to filter spam

Compare 

Compare Rspamd with other spam filtering systems

Documentation 

Study how to install, configure and extend Rspamd using the documentation provided

Media 

Watch videos and presentations about Rspamd

Donation & Support 

Check this page if you need help or want to make a donation or contribute to Rspamd

Locaweb is the largest email provider in Brazil, Locaweb supports more than 10 million inbound email addresses and processes more than 200 million email messages a day.

Beyond the Rspamd’s performance can be only compared with some extremely expensive brands available on the market, it has a bunch of powerful features and algorithms that constitute an amazing tool against Spam and other email abuses.

Rspamd is broadly customizable and allows multiple strategies to avoid Spam and false positives. In conclusion, Rspamd team is not only giving an incredible support for Locaweb but it has also been a great partner.

Rafael Abdo Computer Security Incident Coordinator

Following its fast development and truly innovative ideas, mailcows migration to Rspamd was only a matter of time. The concept of Rspamd is to be expandable. If it is within the scope of a mail filter, Rspamd is able to handle it.

Rspamd is an important enrichment for the open source community.

André Peters The author of the Mailcow project

Rspamd offers a plethora of filtering options and great performance. Per user settings enable us to provide spam filtering for multiple tenants. Furthermore Rspamd makes it very easy to write custom rules, which allows us to quickly react to spam outbreaks.

Arthur van Kleef System Engineer

We started to use the product with the first public versions and for us Rspamd is a natural choice, which is providing speed, flexibility and has rich set of features.