email bot for PGP/MIME PGP/Inline conversion

martijn.list martijn.list at
Mon Jul 14 18:06:37 CEST 2014

On 07/14/2014 05:44 PM, Hauke Laging wrote:
> Hello,
> first I admit that this is not a GnuPG problem.
> AFAIK the smartphone OpenPGP clients are incapable of handling
> PGP/MIME yet. Wouldn't it be nice to have a mail service where you
> can send a PGP/MIME mail to and get it back in PGP/Inline format
> (or more general: in the other format)?
> If the message is encrypted then there would not even be a privacy
>  concern.
> Unencrypted mail could be forwarded (and sent back) encryptedly.
> The service provider could read it though.
> If such services become established (of course, after so much time
> the smartphone apps should finally be fixed...) then the mail
> providers could offer this service themselves. They already know
> the mail content anyway.

Unfortunately this won't work. You cannot convert a PGP/MIME message
into a PGP/INLINE message and vice versa. With a PGP/MIME message, the
complete MIME structure is signed and/or encrypted. This includes
attachments etc. With PGP/INLINE every individual MIME part is signed
and/or encrypted.

Kind regards,

Martijn Brinkers

CipherMail email encryption

Open source email encryption gateway with support for S/MIME, OpenPGP
and PDF messaging.


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