The email address can be found in the old version of the map (1.2), which someone else uploaded back in 2005 (from the first comment: "another i found, great "gossip" system, quality, check it out."). So unless I also hacked the old mapmaker's email address to register here in 2023, I think you'll find that I'm the same person.
I've also uploaded a screenshot of my maps folder showing some of the different versions I've managed to retain over the years, along with the last modified dates.
Edit: Realised you also meant that the email address could have been re-created. I've attached a screenshot of my inbox filtered by the map name as well - you'll see emails about it going back to 2005.