[ushi]

You should have included the next paragraph. They make a difference between user data and the users emails:

"Access to the log data of mail and web servers and to the e-mails contained in a mailbox, on the other hand, requires a search and seizure warrant signed by a judge, unless the investigative authorities can claim exigent circumstances. Telecommunications providers again have no legal recourse against search warrants; seizure of the log data cannot be denied."