rspamd/rspamd

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

2514 stars · 483 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Rspamd is an advanced spam filtering system and email processing framework written in C with an extensive Lua plugin API. It evaluates messages using rules, statistical analysis, and external services, and can act as a Milter to integrate directly with MTAs like Postfix and Sendmail.

Use cases

• filter spam from incoming email on my mail server
• integrate spam checking with postfix via milter
• score emails with bayesian statistics and url blacklists
• add dkim signing and verification to email processing
• write custom email filtering rules in lua
• process hundreds of emails per second with low latency

When to choose

• you run your own mail server and need high-performance, extensible spam filtering
• you want milter-based integration with Postfix, Sendmail, or other MTAs
• you need customizable filtering rules via a Lua plugin API

When to avoid

• you need a simple hosted spam solution without self-hosting infrastructure
• you only need basic client-side spam handling in a mail client

Facets

service · maturity active

security email middleware plugin-system email security self-hosted bsd cross-platform self-hosted spam-filter milter email-processing lua-plugins dkim mta-integration messaging linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="rspamd/rspamd")