Offline labels: Peoples that operate through snail mail?

[gabalgabow]

Do you know if some labels/ distros still operate strictly through snail mail in 2019?

I mean without website, without facebook, or even without email adress...

Everything done through old snail mail (Regular letters)

Might it be metal, noise, experimental, etc

There was still some a few years ago... But in 2019?

[Lux Molly]

Matching Head (noise) run by the Culver lad doesn't put anything up online.
Does all his business through Discogs so not sure if that counts.