Hi there. I try to find out how to attach my public key to my messages by default. The faq (https://support.mozilla.org/en-US/kb/openpgp-thunderbird-howto-and-faq#w_why-does-thunderbird-automatically-send-my-public-key-whenever-i-digitally-sign-an-email) says that if I sign my messages, my public key will be attached automatically, but that's not the case. I always have to click security -> attach my public key, otherwise Thunderbird will not attach my public key. What am I making wrong?