Dr. Nikolaus Klepp wrote:

> But what I miss in kamil+PGPG is an encrypted mail-subject, e.g "Subject:
> [trinity-users] Re: more re. tde and qt5" beeing replaced by a random
> string, which gets replaced on the receiver side with an embedded subject
> from within the encrypted mail. Reason is, that a lot of users use a
> subject that tells a lot about the mail content, at least enough to let it
> be sorted in "interesting" or "junk".

As far as I know the subject is required by the mail server and is not part
of the RFCs I read so far.

Whatever protonmail is - the base concept of encryption is implemented in
kmail+pgpg and there can not be anything else to provide secure
communication that is not part of this implementation.

regards