It seems real, but still highly debateable. And given that the address is on Tor makes it difficult to trace, since the original request was jumped to multiple relays before reaching the receiver of the email. All the data sent and received in the network is protected with multiple layers of encryption, and cracking through all of them just to know which IP it originated seems impossible.
cracking all of it NOW will only reveal the relay peers of .. guess.. NOW
they dont hold logs of 11 years ago.. so it isnt 'seems impossible' .. but 'definetly impossible'
Not is it just impossible, even if it was possible why would anyone want to? The man obviously wants/wanted to be left alone, so people want to ignore his wishes and make him some sort of celebrity? I don't get this, I understand curiosity but this would be actively going against the wishes of someone most people admire and respect.
Don't push yourself to hardly find someone that doesn't want to be found.
That's why Satoshi made himself anonymous or a mystery because he wants bitcoin to grow without even making people know his identity.
Instead, we should focus on bitcoin's growth and its importance because if we look for the true identity of Satoshi, we will just waste our time to find the truth. There are already a lot of people who are claiming to be Satoshi for the sake of fame, credits and money, so it is hard to believe someone or a certain article these days.