How often would you be able to detect acceptance-but-non-delivery of your emails to office.com-hosted emails?

Always? If emails are not answered you'll usually notice unless you're a Spammer

MS live/hotmail/outlook would silently drop - although not for this DMARC, that gets a straight bounce.

>Always? If emails are not answered you'll usually notice unless you're a Spammer

Means you're not using your email seriously. For example, to send CVs in response to job postings.

I send up to 20 email per day to people who have issues with their package build scripts, and I have no idea whether they ignore me because they stopped using the distro or because mail got dropped.

Does it ever get silently dropped or just filed straight in their spam folder?

Silently dropped in my case.. that’s why I stopped self-hosting. Email hosting is sadly now a cartel

And that happens even with DKIM and SPF correctly set-up?

> How often would you be able to detect acceptance-but-non-delivery of your emails to office.com-hosted emails?

You should be able to see this on your DMARC dashboard

Now watch the goal post moving at light speed. This site is by business for business. They can't stand self hosting. Saas or bust. No matter how much time you spend demonstrating the opposite the next time someone mentions email they'll get a backlash. It's mind boggling how it plays out the same every single time. But give them a saas that returns the next integer for $19.99/month and that "creator" will be praised for their hard work. :)