Twenty-plus years on, SMTP callbacks are still pointless and need to die

bsdly.blogspot.com

A rarely used legacy misfeature of the main Internet email protocol creeps back from irrelevance as a minor annoyance. You should ask your ...

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The Things Spammers Believe - A Tale of 300,000 Imaginary Friends

nxdomain.no Peter N M Hansteen Sep 7, 2022

3 inbound links en spamantispamspamdspamdbgreytrappingOpenBSDfree softwaresecurityopen source securityfirewallPFpacket filternetwork tools

Harvesting the Noise While it's Fresh, Revisited

nxdomain.no Peter N M Hansteen Jan 12, 2025

3 inbound links en host txt queryspamdbOpenBSD spamdspamdgreytrappingSPF usefulgreylistingGREY stategreylisting vs multiple outgoing SMTP hostsOpenBSDcybercrimegreen computinggreen cybercrime detection