receiving spam to NANOG-harvested archive message-id's

I have received spam to a address belonging
to a post to NANOG 2 years ago:

Thanks to a number of people, including List-Mom, that have pointed me to the
right location: and from there:

It appears that is freshly redesigned and
is not (yet) linking to the above page.

And no, the archives have the headers stripped. Can't see the Message-ID's
there. Hmm.