When it comes to email, the stuff we *don't* argue about is so much more important than the stuff we do. Think of how email list providers blithely advertise that they can tell you the #OpenRate of the messages that you send - which means that they embed surveillance beacons (#TrackingPixels) in every message they send:

https://www.wired.com/story/how-email-open-tracking-quietly-took-over-the-web/

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