I2p & TOR Support
Many sensitive documents may go through Tutanota, therefore many users may want to access it with full anonymity.
I suggest using BOTH I2p and TOR for this.
This post may get a lot of hate as it is very disputed between TOR and I2p and which is better for hosting encrypted and anonymous services. This is why I ask for both to be supported and not just one.
For Info on the what makes I2p and TOR different: https://geti2p.net/en/comparison/tor
Another bonus of using TOR/I2p is because of the added encryption over HTTPS.
David Boyous commented
I agree most companies only use TOR. I2p is arguably more anonymous and secure PLUS can be used over TOR if needed.