On Oct 25, 2010, at 8:07 AM, John R. Levine wrote:
The one that stands out is "multipart/signed" (from RFC1847) which drops to
about a 65% survival rate. I don't know much about how this is typically
formatted or treated enroute, but it was easily the biggest outlier in the
report. Not sure if that should be a surprise to us or not.
I'm surprised. That suggests something often adds the S/MIME signature after
the DKIM signature, but as far as I know, S/MIME signatures are usually
applied by the MUA.
Someone was hawking a box to sign and verify RFC 2015 PGP signatures at the
enterprise firewall a few years back. That'd break DKIM signatures with a
multipart/signed outermost type.
Cheers,
Steve
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