It’s not limited to German users, but those might be especially inclined since it’s a Berlin-based company 🙂

I’ve said it in another thread: German users should consider posteo as a green, safe, and affordable (1€/M) alternative. https://posteo.de/de

Search for ET Legacy, which is what the project continuing development on the ET codebase is called, optimizing it for modern systems and sporting a sizeable community.