True, but #Thunderbird has gone to lengths to try and make sure that #e2ee either works completely, or not at all. I don't think they'd be on board with one-way encryption.

I'm not sure if this is the right way to go.

It's risky to allow one-way encryption, since the reply will (likely) quote the email and reveal stuff. Maybe we need Thunderbird to nudge people into enrolling in WKD.

I agree. but sometimes it would be very helpful if users could encrypt sensitive information with one-way encryption without having to deal with pgp setup themselves. With WKD of the receiver, this is relatively easy for inexperienced users to accomplish.