Tool Tips

Tool Tips

Article from Issue 175/2015

Quick takes on cool tools for Linux.

Rspamd 0.8.1

Modular spam filter

Source: https://rspamd.com

License: BSD

Alternatives: SpamAssassin

Rspamd sets out to do battle with advertising email. The tool uses various filter functions. For example, its sender policy framework tests whether the sender was entitled to send the message. Rspamd also relies on the DomainKeys identification protocol (DKIM) to investigate the encryption signature of an email message. Last but not least, the tool draws on public DNS and URL blacklists.

After launching, rspamd provides a web interface for the local interface on port 11334, allowing users to configure and manage the system. You can define your own filters using regular expressions, query the current status, and feed the tool spam for teaching purposes. According to the developers, the program – written in C – offers good performance and cooperates well with MTAs such as Postfix, Exim, and Sendmail.

If you want to extend the functionality of rspamd, you can program your own extensions in C, Perl, or Lua. The project page offers information and documentation for the Lua API.

4 Stars – The rspamd tool significantly reduces the spam burden on mail servers. The web interface keeps things clearcut and, in combination with the documentation, helps users set up their own checks. However, you should expect a long learning curve before tackling fine adjustment of the filters.

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