Many of my 'rules' have stopped working. I've tried deleting and re-entering them, modifying, etc., but still won't work.

Some rules are still working but new rules and some modified rules are not. Even if I delete the rule and re-enter it, it doesn’t seem to work.

Hello,

please make sure that all rules has exact email address or contact in them, even slight change will result in non functional rules.

also have you created rule that prevents other rules from functioning, you can make rule that under designed conditions will cancel rest of the rules.

regards
Jan