[Mailman-Users] Preserving S/MIME-Encoded Mail

Grant Taylor gtaylor at riverviewtech.net
Tue Jan 20 05:19:58 CET 2009

On 01/16/2009 04:43 PM, Brad Knowles wrote:
> I don't think it broke the signature, I think what happened is that it 
> hasn't been encapsulated in the correct manner.


> At the very least, you can do a message/rfc822 bodypart, and that should 
> guarantee that the signature is not broken, assuming that there's no 
> changes in whitespace encoding, etc....
> However, I don't know how most MUAs would handle that in a signed 
> message. A more intelligent encapsulation format should hopefully 
> address that issue.

Agreed.  I'm not sure how receiving MUAs would handle this.  I know that 
a message/rfc822 MIME body part is how messages are forwarded (as 
attachments) so they should be ok.  At least I can forward a message as 
a message/rfc822 MIME body part and then later strip away everything but 
the contents of the message/rfc822 MIME body part and the message will 
then be able to be validated again.  I will play with forwarding an 
S/MIME signed / encrypted message and let you know what my MUAs (of 
choice) do with the message/rfc822 MIME body part.

Grant. . . .

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