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