# 
[](https://ci.rspamd.com/rspamd/rspamd)
## Introduction
[Rspamd](https://rspamd.com) is an advanced spam filtering system that allows evaluation of messages by a number of
rules including regular expressions, statistical analysis and custom services
such as URL black lists. Each message is analysed by Rspamd and given a `spam score`.
According to this spam score and the user's settings, Rspamd recommends an action for
the MTA to apply to the message, for example, to pass, reject or add a header.
Rspamd is designed to process hundreds of messages per second simultaneously, and provides a number of
useful features.
## Getting Started
A good starting point to study how to install and configure Rspamd is [the quick start guide](https://rspamd.com/doc/quickstart.html).
Rspamd is [packaged](https://rspamd.com/downloads.html) for the major Linux distributions, and is also available via [FreeBSD ports](https://freshports.org/mail/rspamd), NetBSD [pkgsrc](https://pkgsrc.org) and [OpenBSD ports](http://openports.se/mail/rspamd).
You can also watch some [videos about Rspamd](https://rspamd.com/media.html).
## Spam filtering features
Rspamd is shipped with various spam filtering modules and features enabled just out of the box.
The full list of built-in modules could be found in the [Rspamd documentation](https://rspamd.com/doc/modules/).
If that is not enough, Rspamd provides an extensive [Lua API](https://rspamd.com/doc/lua/) to write your own rules and plugins:
## Contributing
Please read [CONTRIBUTIONS.md](CONTRIBUTIONS.md) for details on the process for submitting pull requests to us.
## Authors
* **Vsevolod Stakhov** - [vstakhov](https://github.com/vstakhov)
See also the list of [contributors](AUTHORS.md) who participated in this project.
## License
This project is licensed under the Apache 2.0 License - see the [LICENSE.md](LICENSE.md) file for details
## References
* Home site:
* Development:
* Site repository: