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In a recent piece titled The Things Spammers Believe – A Tale of 300,000 Imaginary Friends, undeadly.org co-editor Peter Hansteen summarizes more than 15 years (yes, it has been that long) of improving the noise levels in mail feeds.
The main tools are what comes in the base system of our favorite operating system, with particular focus on spamd(8) and the greytrapping feature.
The article leads in with
It finally happened. Today, I added the three hundred thousandth (yes, 300,000th) spamtrap address to my greytrapping setup, for the most part fished out of incoming traffic here, for spammers to consume.
and is liberally sprinkled with references to other relevant material.
The article is also available in a trackerless (aside from the server’s ordinarily rotated log) version.
