Of course there is an alternative, it's called encrypting your E-mail, and has been around for decades (for example in the form of PGP/GnuPG/GPG/whatever). Tha

Of course there is an alternative, it's called encrypting your E-mail, and has been around for decades (for example in the form of PGP/GnuPG/GPG/whatever). That said, having observed its history for the last 26 years, I do not think it is an accident that PGP/GnuPG is so difficult to use, poorly developed, generally marginalized, and has not been adopted by any of the big E-mail software authors. Think of it another way: if Apple decided to really be pro-privacy today and built support for GPG into its Mac and iOS apps, the problem would be largely solved. But for some reason they do not, nor does any other major software maker.