It is our credo that patents must never be used to hinder innovation. Fighting patent abuse like this one is an important global issue:
https://arstechnica.com/tech-policy/2018/06/inventor-says-google-is-patenting-work-he-put-in-the-public-domain/
That's one reason why we've joined LOTnet, a global non-profit organization committed to protecting all members against patent trolls: https://tutanota.com/blog/posts/Tutanota-joins-LOTnet