[dmarc-discuss] MLM and Header-From rewritting - the SMTPopen-relay analogy

John Levine johnl at taugh.com
Mon Jun 9 06:57:34 PDT 2014

>On your most recent message my Mac client says “Unable to verify message signature”. Clicking on
>“Show details” it says that the certificate is not valid, email address mismatch.

Alpine said it was signed, with a note at the bottom about the signing
address. Thunderbird said it had no signature.

I think we can say this is a corner case that MUAs don't address consistently.

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