Yes. In the specific example that I gave though (the recipient being your friend), it likely wouldn't happen because your friend is not going to get something n

Yes. In the specific example that I gave though (the recipient being your friend), it likely wouldn't happen because your friend is not going to get something notarized to use against you. There could still be a problem if the hacker has control of your friend's email account while you send your email, because then the attacker can get it notarized.