The problem is that decrypting software will do: "Here's the message and some 'extra stuff'". Now, this 'extra stuff' might not be HTML, might be something whi

The problem is that decrypting software will do: "Here's the message and some 'extra stuff'". Now, this 'extra stuff' might not be HTML, might be something which might trigger something else. I really do not know but some smart guy might figure out how to exploit that part. Or might not.