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by nullc
621 days ago
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Hi Mike. Please provide the complete enclosing headers of the email in question, along with their DKIM signature. The header trace will help dispel any allegations that the messages were delayed for technical reasons or were otherwise corrupted. |
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As a result of timestamping emails with their DKIM into Bitcoin, now even rotated, broken, or released keys can be used to partially authenticate e.g. Google messages. You can see this for example in this project here:
https://github.com/robertdavidgraham/hunter-dkim
And in particular, here:
https://github.com/robertdavidgraham/hunter-dkim/pull/5
So you see, even historical DKIM signatures can act as strong authentication.