Moved to Malware Discussion > Home User Assistance. Apparently this is a threat after I Googled that email address, however, all the results were in Dutch or German which I had to translate using my browser tool. It appears to belong to the police hoax family of ransomware and I hope that you didn't click on any part of it. The originals of which had "BUNDESPOLIZEI popup" and "POLITIE, Onwettige activiteiten gedetecteerd!!!" as headers.
On second thoughts I've moved this to Top Threats.