encryption negotiation like pidgin-otr but for email

Dear LazyWeb,

I’ve recently been using pidgin-otr a lot and I have to say, I love it. The setup is straightforward, I’ve watched the XMPP as it goes and I feel pretty good that google can’t see my stuff. Yay.

However, it makes me want to have a similar feature for evolution or tbird. Something so I can say “send this person an email and confirm encrytped communication between us”

I did some searching and I found nothing.

Any thoughts?