@pettter Today I replied to an unencrypted email about software I used to develop. I typed the reply, I pressed Send (encrypt+sign were pre-checked) and Enigmail said "I don't know the key for this email". I pressed a single button that said "Download unknown key" or something and was presented with a verification dialogue window. I pressed OK and afterwards filled in my secret passphrase.
The email was encrypted, signed, sent and received by this person.
The only way to make that easier, which I wouldn't enjoy myself, is to automagically request the unknown key without having to press that button.
Do you have any suggestions on making that any easier?