Earlier quoted context omitted.
There was no chance that everyone would be running their own email server, but if it wasn't for the lack of IPv6 adaptation a plug and go home email server solution would probably see a decent amount of use. I'd bet we'd already be seeing it as a feature in most mid-ranged home routers by now.
The mail server in a router is easy to host, the problem is: 1) Uptime (though this could be partially alleviated by retries) and most of all: 2) "Trust"/"Spam score" It's the main reason to use Sendgrid, AWS, Google, etc. Their "value" is not the email service, it's that their SMTP servers are trusted. If tomorrow I can just send from localhost instead of going through Google it's fine for me, but in reality, my ema…
I had quite a bit of success with it and of course, DKIM and the other measures you can take some years back.
For personal emails, I don't think I had any which fed straight into spam.