Stop sending to all if all do not have a need to know.
“Reply All” is convenient. It is easy. BUT – If all don’t need to know, you’ve just intruded. Yes, every unnecessary email IS an intrusion.
Some companies have actually removed the ‘Reply All’ button. What a novel idea!
Be frugal with who’s copied on your responses. Not only will it save them time, YOU won’t get their response – so you’ll get less email too.