I tried Betterbird but didnt note a difference for my use. Went back to Thunderbird due to auto update vs manually downloading and installing.

You can install both side by side so you can try them both.

This ia huge clickbait sadly. It’s some random small oktoberfest, where some drunken germans maybe doing the Hitler greeting.

I’m not saying it’s okay what they do, but by far not world news. This would be maximum local news if at all.

But you cannot have your own domain on posteo as far as i know.