Okay, I discovered that Outlook.com MXes do not advertise STARTTLS capability to blacklisted IPs.
Scratch that, it may be a more specific issue. I can observe missing STARTTLS capability only from one location.
outlook.com MX does not support TLS in 2020.
https://github.com/foxcpp/maddy/issues/301#issuecomment-734923637
When email service providers start having large volumes of spam moving through their services, they apologise and fix the problem urgently. If they don't, they get blackholed and can't send email anymore.
When a centralized platform with an effective monopoly does it, they tell FOSS maintainers its their job to keep spam off of the platform
People keep rationalizing their beliefs and go voice such incomplete reasoning at the nearest echo chamber.
My repository with binary packages for Arch Linux.
Packages available for: maddy, chasquid, ssr-wlroots fork, prometheus-bird-exporter, pkcs11-proxy.
"Why privacy matters" and also some technical aspects of online privacy
https://thistooshallgrow.com/blog/privacy-security-roundup
And so I made another project public, but not on GitHub - instead it is git.hexanet.dev, our own gitea server. Right now it is not complete, but I guess I will need to learn the art of telling people about cool stuff I made instead of relying on GitHub to get somebody there via their "discovery" thing.
This is related to points I made about distributed ledgers before. There are thousands of problems people think they can solve but in reality they cannot.
"Out of over 86,000 blockchain projects that had been launched, 92% had been abandoned by the end of 2017"
Pragmatic open technology enthusiast.