Unfortunately I don't have time to read this right now, but I wrote a less dense article of a similar topic that was intended as an internal training document w

Unfortunately I don't have time to read this right now, but I wrote a less dense article of a similar topic that was intended as an internal training document which ended up being good blog fodder at work: https://www.a2hosting.com/blog/how-email-became-an-important-yet-complex-abused-solution/ https://www.a2hosting.com/blog/how-email-became-an-important... I have a lot of respect for the authors of the linked article (not me, the OP!) because I know how much research my own article took. I can imagine theirs was a lot more.