On Saturday 27 November 2010, Mike Korizek wrote: > On 11/26/2010 08:46 AM, Olav Seyfarth wrote: > >> Is it possible to forward a digitally signed email without loosing > >> the signature information of the email? > > > > Yes, inline/cleartext signed messages may just be forwarded as they > > are (as attachment or as copy, just don't quote them ;-) ). > > PGP/MIME signed messages should be forwarded as attachment in > > order not to lose the sig. > > Hi Olav > > I did some tests with different email clients by forwarding it as > attachment. > > Unfortunately the clients add different content-disp, -type. > E.g. Evolution makes a content-disp inline whereas Thunderbird makes > a content-type rfc822.
The value of Content-Disposition is irrelevant and shouldn't cause any problems. The correct Content-Type for attached messages is message/rfc822. FWIW, KMail sets Content-Type message/rfc822 and Content-Disposition inline when forwarding messages as attachment. > I need to pares the email with perl in order to extract the original > email so I can verify the signature - KMail can verify signatures of forwarded signed messages out-of-the-box. It nicely displays a signed forwarded message (including the signature status) inline in the enclosing signed message. In fact, this works for arbitrary deeply nested signed and/or encrypted messages. Think Matryoshka doll. :-) Regards, Ingo
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