Keep smiling, waste spammers’ time with OpenBSD tools

When you’re in the business of building the networks people need and the services they need to run on them, you may also be running a mail service. If you do, you will sooner or later need to deal with spam. This article is about how to waste spammers’ time and have a good time while doing it, using the free tools OpenBSD offers to do your greylisting and greytrapping before any content filtering. It’s fun and easy.