Subscribe your assistant to a newsletter:
The newsletters piling up in your inbox can go to your assistant's inbox instead. It has its own email address, so sign it up for the ones you mean to read and never get to, and it works through what comes in.
Pick the exact senders for a scheduled task:
When a scheduled task pulls from your inbox, you can now name the exact senders it should watch. Point a weekly digest at just your portfolio founders, or a personal one at just your family, and it leaves everything else alone.