[Ietf-dkim] X-Google-DKIM-Signature header field

Jim Fenton <fenton@bluepopcorn.net> Tue, 27 August 2019 21:54 UTC

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From: Jim Fenton <fenton@bluepopcorn.net>
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To: ietf-dkim@ietf.org
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Date: Tue, 27 Aug 2019 14:54:40 -0700
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf-dkim/JGVmeKtoX6p9G4e4dp4l4tFgAIs>
Subject: [Ietf-dkim] X-Google-DKIM-Signature header field
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[resending because I needed to correct subscription address. Apologies
for duplicate if the moderator approves the original.]

I recently got a "welcome" message from a list.nist.gov mailing list
that is apparently hosted on Google infrastructure. I notice it wasn't
DKIM signed, but did have a X-Google-DKIM-Signature header field that
looked like a normal DKIM signature with d=1e100.net (one of Google's
many domains). Apparently Google doesn't intend that I rely on this
signature for anything, but does anyone know why they aren't applying a
normal DKIM signature from 1e100.net here?

-Jim