...

That remail@extropia.wimsey.com is in Canada specifically makes communications with it fair game for NSA interception, however.

NSA interception is world wide.

On the other hand, extropia uses PGP encrypted messages to its remailer, and NSA PGP-breaking is distinctly *not* world-wide. I assume it doesn't use PGP encryption for the anonymous outgoing side, but you can always encrypt the message before encrypting it for extropia.