Thanks, Peter. I recall seeing your post, > The greytrapping retrospective at > https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html > (also with GOOG's trackers at > https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html) > might be useful. sometime last year, but couldn’t find today it amongst all the “newsletter optimisation” posts.
It’s a long shot, but do you have any stats (or failing that a gut feeling) regarding the proportion of spam caught in your spamtraps from sources not listed in the standard DNSBLs? I drop traffic from listed IPs at the CONNECT stage, so I wonder how effective spamtraps will be without my having to spin up a separate MX. Cheers, Dan
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