[timthorn]

Looks very suspiciously like test data:

Exactly 10,000 rows in the dataset

Every name (Firstname, Surname, Streetname) occurs ~50-70 times

Every email address is from a small set (~5) of mail hosts

[thomas11]

And the street addresses (all German) don't actually exist - I tried a sample -, street names and cities seem to have been combined randomly.