William,
I think you're arguing in favor of your earlier ideas on MIME
encapsulation, but as I read it all of the things you're describing are
dealt with if the mailing list (or whatever munges the message) re-signs
it after modification. Is there any situation you see where re-signing
isn't feasible?
-Jim
william(at)elan.net wrote:
I've been looking at what do different mail redirection systems (mail lists
in particular) do with emails and discovered that some (especially newer)
mail lists treat S/MIME and PGP/MIME signed email different then other
email they process (not surprising and this is obviously a good thing).
In particular what I found interesting cases when mail list saw
multipart/signed as primary Content-Type in the email header, it made
that into separate multipart/signed mime part and made the email itself
multipart/mixed consisting of this multipart/signed part as first one
and then text/plain with mail list signature.
So in this case email list not only added text at the end but in the
middle and changed content-type and I imagine this would be a problem
for IIM. This case is also why I said when I first saw DK draft about
year ago, that for mime messages, signature should be linked to mime
part(s) rather then be for entire message.