said Dr. Nikolaus Klepp: |The point of protinmail - as I see it - was an email address, that could | not be associated with a real person. But protonmail changed the initial | user authentication to require a handy or some other identifyable device, | so the main purpose is gone. not necessarily. while two-factor authentication is offered, it is not required. |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". that's the point, and why setting it up to work with kmail requires an intervening application, the protonmail bridge. normally one would use the protonmail web interface -- essentially webmail -- which is entirely encrypted, or a special application that seems to be little more than a one-site secure browser connected to the protonmail site. (for linux: https://github.com/protonmail-desktop/application) but to use it with kmail or another mail client one needs to employ the bridge application, which encrypts before sending and decrypts upon receipt, on which a regular mail client can be hitched. (details here:https://protonmail.com/support/knowledge-base/third-party-email-client -integration-outlook-thunderbird-apple-mail-ect/) in each case, as i understand it absolutely everything is encrypted: subject, sender, recipient, the works. the advantage to two-factor encryption in the service is of course added security should someone learn or guess your password but also the service's claim that with two-factor authentication not even the owners of protonmail can read your mail. i should mention that they offer a free version, which gives you a protonmail.com email address and limits your storage to 500 mb and each user to 150 email messages per day. though some features -- using your own domain, use of protonmail bridge -- are restricted to paid accounts, the cheapest of which is € 48.00 per year. and i think i've carried the forum terribly off-topic. i am not, btw, a protonmail salesman! dep Sent with [ProtonMail](https://protonmail.com/) Secure Email. Because privacy matters.