other domains forging dkim sig

From: <shmick_at_riseup.net>
Date: Fri, 07 Nov 2014 00:47:42 +1100

from time to time i see google passing multiple other external domains
for dkim is the domain purported to have dkim signed from one of my
domains example.net

how is that possible other than a private key compromise or a mistake by
google ?

Received on Thu Nov 06 2014 - 13:48:09 PST

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