On Thu, Nov 17, 2011 at 05:37:50PM -0500, Dave Dodge wrote: > On Thu, Nov 17, 2011 at 11:21:49PM +0100, P. Mazart wrote: > > Stas Verberkt schrieb am 17.11.2011 14:43:46: > > > Nevertheless, disabling the "clear text" mode is not really an option, > > > as this would render all my e-mails unreadable by those using older > > > e-mailclients or e-mailclients on smartphones. > > > > Actually we might not have an idea, what “clear text” mode is… > I understand this is a bit low on information, the problem is that Outlook does not give much more information in itself. However, I seem to have found some pointers on their technet website: http://technet.microsoft.com/en-us/library/aa995740%28EXCHG.65%29.aspx http://technet.microsoft.com/en-us/library/aa995749%28EXCHG.65%29.aspx
> I believe in this case Outlook uses S/MIME multipart/signed, so the > signature is in a separate body part and clients without S/MIME > support can still read the text/plain part of the message. > > The other way Outlook can send signed messages (with "clear text" > disabled) involves wrapping the signature *and* text into some sort of > PKCS binary blob, which obviously causes a lot of trouble with other > clients. > This is probably true. Deactivating it leads to an attachment calles "smime.p7m", in which the e-mail and signature reside. According to those two Microsoft Technet pages, this is opaque signed. The other option is then clear text. However, this seems not to be inline, when I examine the message (as opposed to those send by Mutt). It seems these message have a text/plain and a text/html bodypart, as well as an "smime.p7s" attachment with the signature. If I could clarify more, I would be glad to do so. Kind regards
pgpvOBBTeKXyM.pgp
Description: PGP signature
