[Panzer04]

1kj is nothing. That's 0.3wh, or 0.0003kwh.

[marginalia_nu]

That's for a single inference though. You can do about 3600 of them in an hour.

[aubanel]

Yes but the article's setting is precisely about 1 email so 1 inference, and their number is 0.14kWh, which is way off.