I haven’t productionized this setup (I send maybe a dozen emails a year) but it worked for me ad hoc a couple years back, when I had to send a mail to an Outlook-hosted address and they blackholed everything I tried to send while 250 OKing me.
I ran a SaaS up until recently. Emailing users notifications for events was just a normal part of the app. Users got upset when the emails didn't come through. So then I had to be email tech support for something I had no control over. Lovely.
It's always people self-hosting mail on a shared server in Moldova (because they think it makes them cool) that are complaining.
https://www.mimar.rs/blog/a-journey-of-my-mx-server-to-new-r...
And yes, it's cool not to have to let scum read your private communications :D
Which with cheap models like Jev as spam classifiers, this can now become a reality.
The problem is, Google and Microsoft have monopolized the entire email market, so their esoteric deliverability mysticism from 2007 still persists (basically blanket bans on entire IP spaces, locking out anybody trying to send emails on their own).
Email naturally followed this evolution.
I've never even had the key to mine. I've lived here over a decade.
You shouldn't own your car or your house, give them to all the corporations as well.
As soon as you want to do business with Outlook's customers, you play by their rules.
"They're allowed to do it" is one of those things that doesn't really bear saying so much because that's already been implicitly established. Nobody is claiming what they're doing is illegal, so how does this add anything of value? Who is still unaware that corporations will use their size and market control to their benefit?
"Their rules" seems to be turning into "you spend money to another corporation that we trust".
This is also true for like 99% of the landmass of America.
Switch Moldova to almost any country (or even a state that isn't California or Washington), and it's the same story everywhere
With LLMs on the other side trying to make spam less detectable by cheap models like Jev?
It's funny when people assume benefits from some tech go one way and baddies will surely never use it...