Eighteen Years of Greytrapping Retrospective Published

OpenBSD users and aficionados are more likely than others to be familiar with the concept ofgreytrapping(the nastier kid sister ofgreylisting),as implemented via the OpenBSDspamd(8)spammer taunting software.

The feature has now been around for 18 years, andundeadly.org co-editor Peter Hansteenfound that and another milestone to be a good reason to write a retrospective:

Friends, it finally happened. On August 7th, 2025, the number of spamtraps intended to woo the unwary spammer rolled past the number of inhabitants in my home country of Norway. It's time for a retrospective.

So I wrote up one: Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? (also available with G's trackers here) is a retrospective article with data and graphs.

That's right, we've been making life harder for spammers for 18 years.Peter's writeup has links to data, and more field notes and war stories thanhe could actually remember writing when he started on the retrospective.