From the Tutanota Blog:

“The highest court in Europe ruled this week that “general and indiscriminate” data retention directives are against European Union law. This is a great victory for our right to privacy. It calls into question many recent surveillance laws passed by European Union member states such as the United Kingdom, Sweden and Germany.

“The European Court of Justice (ECJ) has ruled that a “general and indiscriminate retention” of data is against EU law and can only be done under certain conditions and ‘solely for the purpose of fighting serious crime’.

“The ruling declares that countries are not allowed to impose laws requiring internet service providers to retain all their customers’ data, restricting the practice to specific cases of a ‘serious crime’.”

Details may be found at: https://tutanota.com/blog/posts/eu-ruling-data-retention.