[farisjarrah]

I've been reading about this, and there seems to be a lot of debate still on implementing E2EE via the email providers. From what I have gathered most email providers use TLS and encrypt data on disk at rest, but they feel like its pointless to implement E2EE, because by default as 99% of incoming emails are all unencrypted, and 99% of emails need to leave your email unencrypted(otherwise the receiving email party would be unable to read the encrypted message)

[zaksoup]

On the page they also bring up a great point: a bunch of optimizations allowed by JMAP (including storing attachments as blobs and separating their payloads from other content) wouldn't be possible if the individual messages were E2E encrypted.