The rspamd daemon, maintained by the Rspamd Project, is a modern spam filtering daemon which can be integrated with any MTA which supports milters. It provides 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. A web-based user interface is also provided.

The debops.rspamd Ansible role can be used to configure the rspamd service on a host and automatically setup the debops.postfix role to use it for spam filtering.