Public Domain

"The domain eastangliaemails.com is registered anonymously"

As are several billion others. It's meaningless. Also, the exceptionally great and industrious concerned citizens who have provided that archive are undoubtedly not the hackers themselves, so they are not data thieves. They simply organized what was available on multiple torrent sites.

If they're 'data thieves' for archiving the e-mails on the web, then so is every other news organization and individual quoting from them, in print and on the web.

At this point, it's all in the public domain.