This talk overstates the problem.
I personally have run my own mail server for years, including for awhile on a residential DSL connection, using https://www.authsmtp.com/ to actually send mail.
I've also experimented with sending mail from that same DSL connection. Worked fine to Gmail, and Protonmail once I setup SPF and DKIM.
Try it out yourself!
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Actually more like "the death of marketing spam emails" if this is anything like his article on the same subject.
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probably important to reflect on :)
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