That's what they say:
> By default, we do not keep any IP logs which can be linked to your anonymous email account
And then they shared not only the IP but also fingerprint of the browser.
If we were lawyers, we could certainly argue that "by default" creates a clever loophole that allows them to store IPs for specific clients 🤷
Fortunately, we aren't (at least not me) which saves our right to judge them from subjective and moral point of view 😄