On Wed, 25 Jan 2012 10:20:26 +0000, David Edmondson <dme@dme.org> wrote:
> Isn't it still necessary to ensure that you have encryption keys
> appropriate to the recipient?

I want to ensure that all replies to encrypted to be encrypted.  I would
rather have the reply fail outright than fall back to unencrypted.

Here's a behavior that I think would be reasonable:

 * notmuch reply outputs JSON encrypted flag

 * emacs does a quick check to see if the needed key is available

 * if key not available: give a nice mini-buffer prompt, something like:
 
    'encryption key for "Foo Bar <foo@bar.com>" not found.  Retrieve?'

   * if response is yes: call gpg to retrieve the key

 * if key available: add encrypt flag

   else: I feel like this should abort, but maybe there's something to
         be done here.  Allow reply but don't quote the original?

jamie.