Mandatory email encryption? Great idea, although tricky for enforcement? To be clear, that's mandatory TLS, with E2EE for sensitive mail (but the definition of whether a mail is sensitive is up to the controller). Good for awareness at least, I would expect.
Interesting that it applies to "businesses doing business in Denmark". I wonder how this will play out with foreign companies...
https://tutanota.com/blog/posts/denmark-email-encryption-gdpr
(Hattip: neil_neilzone on Twitter)