Hi,
if I try to send a mail to an individual whose key I don’t have, I am prompted to select key to encrypt with. However, there is no way, at this point, to cancel the mail - if I press cancel, the mail is sent unencrypted. This is, from my point of view, a large weakness; I cannot trust my users to be clever enough to choose another key just to avoid sending the mail, and sending sensitive data in cleartext could prove disastrous (not to mention the trouble we’d get with our auditors…).
Is this possible to “fix”? Or have I missed something obvious? 
/Eirik