Re: encrypted mails and quoted-printable

[Simon Josefsson <jas@extundo.com>]

Andreas Jaeger <aj@suse.de> writes:

>> QP encoding is to avoid the article to be mangled.  Though a message
>> contains only ASCII, lines starting with "From " or so be mangled.
> 
> I see - but that's rather unfortunate.  Is there no way to avoid this?
> I'd rather don't use QP.

Then you'd be breaking the PGP/MIME specification, and the receiver
probably couldn't validate your message.

3.  Content-Transfer-Encoding restrictions

   Multipart/signed and multipart/encrypted are to be treated by agents
   as opaque, meaning that the data is not to be altered in any way [1].
   However, many existing mail gateways will detect if the next hop does
   not support MIME or 8-bit data and perform conversion to either
   Quoted-Printable or Base64.  This presents serious problems for
   multipart/signed, in particular, where the signature is invalidated
   when such an operation occurs.  For this reason all data signed
   according to this protocol MUST be constrained to 7 bits (8- bit data
   should be encoded using either Quoted-Printable or Base64).