Brent Clark: > Something to see and keep an eye on (Read: Why build this tool) > > https://www.kitploit.com/2022/01/espoofer-email-spoofing-testing-tool.html
This is old news. The espoofer tool and research were presented I think in 2020 and were widely discussed then. And bug fixes for, say, OpenDKIM and OpenDMARC became available later, presumably also for other affected software.
