On Saturday, October 18th, 2025, the public Rspamd DNSBL RBL feed and what's more important public fuzzy service was disrupted due to an unexpected server block by our hosting provider, Hetzner. This interruption affected hundreds of thousands of users and likely led to increased volumes of spam for many legitimate email services worldwide.

Preface​

Rspamd has always been oriented on the performance but it was always quite hard to measure how fast it was as normally it runs just fast enough.

However, I was recently offered to process Abusix Intelligence feeds using Rspamd. These feeds are used to improve Rspamd fuzzy storage quality, to feed URLs and Emails to the DNS black lists provided by Rspamd project and used in SURBL module.