On: Host your own contacts and calendars and share them across devices

[acidburnNSA]

You're right that all those things are needed, and it did take me a while to get them all working. But now I know about tools like mail-tester [1] that analyze your emails and tell you exactly how to fix them. Once you know what to do, it's really not that much actual work to set them up.

[1] https://www.mail-tester.com/

[urethrafranklin → acidburnNSA]

How feasible would running a mailing list (say 10k subs, one email/week) be off your setup?

[pas → urethrafranklin]

We're doing something like that.

The problem is that you need a lot more volume to be able to use the feedback loop mechanisms ( https://blog.returnpath.com/what-is-a-feedback-loop/ ) efficiently.

Sure, it all works, but it's still the old piece of shit SMTP wild wild west, because when it stops working, you can do nothing. (But usually going to the saloon, having a rough night and waiting will solve things.)