Hi, a friend of mine sometimes sends newsletter-type emails to a fair number of recipients. Usually he remembers to put them all in BCC but every now and then he accidentally puts them all in CC/TO instead. So people get angry (besides, my old iPhone takes ages to display mails where it has to render 500 mail addresses on top first, and I have to scroll until my thumb hurts before I can read the actual message). Anyway, is there any plugin or Script trickery that might give a short notice if any message is addressed to more than say 10 people in CC? "Do you really want to do that?" But he doesn't want to switch mail clients / services (mailchimp, ...) so it would have to be on Mac Mail/Mavericks. Many thanks!