[Digihash]

The idea sounds nice, but I would actually like it if any of the big ones like Microsoft or Google could make an implementation for end-to-end encryption using a standard like PGP or S/MIME.

If they can add features like the temporary "confidential" mail as what Google is implementaing in Gmail, that would be a nice extra. But if we can't even do the basics right, why implement such features that can only be used between your own users?

Because when you try to use PGP these days using different implementation like Thunderbird/Enigmail to Outlook/GPGOL or vice versa, half of the times the e-mail are unreadable, not able to be decrypted or some other mysterious problem.