protonmail offers (extra cost) a vpn service, afaik,  vpn secures the mail 
from man in the middle, ie. isp's, compromised routers, etc. Encryption leaks 
some info enroute making vpn neccessary, not an extra.

$.02
Greg Madden


On Sunday 29 April 2018 02:08:02 am deloptes wrote:
> 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
>
>
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