On Thu, Dec 23, 2010 at 08:29:33AM -0700, Aaron Toponce wrote: > On Thu, Dec 23, 2010 at 01:59:11PM +0000, Simon Ward wrote: > > After a little investigation I believe signed mails that have had > > signatures from mailing lists attached are not decoded until you view > > the message. I’m guessing that Mutt only checks for Content-Type > > multipart/signed, but these messages are multipart/mixed. > > I want to believe that, but it's not the case, at least not for me. On > say the debian-devel mailing list, I can see the signature flag on the > message before I fetch it (I only cache the headers).
I suppose I should have been more clear, especially given we are talking about cryptographic signatures. When I said “signatures from mailing lists”, I meant the plain text footers that get appended to single messages. With PGP/MIME signed messages sent to (at least GNU Mailman) lists that add footers, the mail is wrapped in another MIME message of type multipart/mixed, and another part containing the signature is added. I’m not on debian-devel, but none of the Debian lists I am on appear to attach these footers. Indeed, looking at the debian-devel archives, that list doesn’t either. > ... now that I think about it, is the gnupg-users mailing list modifying > mail headers and stripping/modifying PGP info? The information isn’t lost in the above case, just contained in a MIME subpart. > As you mentioned, changing from multipart/signed to multipart/mixed, > which would prevent the signature flags from showing until after you > view the message in the pager? Yes, I think this is what is happening. Simon -- A complex system that works is invariably found to have evolved from a simple system that works.—John Gall
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