Any 3rd-party solution will have to read your emails in order to categorize those that are from mailing lists and flag them/take action. https://www.trimbox.io/

Any 3rd-party solution will have to read your emails in order to categorize those that are from mailing lists and flag them/take action. https://www.trimbox.io/ https://www.trimbox.io/ is a great simple example If you don't want to authorize an app to do that, consider utilizing inbox rules to automatically delete those emails, but for that you will need to find patterns in subject lines/use of your name/ keywords (how about auto archive every email with the word "donate", or move it to a folder you can review when you want to) etc. And just keep optimizing. CAN-spam act requires every email have an unsubscribe link and that you are removed from lists when you ask too. If these guidelines aren't followed those organizations can be liable to very large fines. Hope this helps. I'm personally a Gmail user and the "Promotions" and "Social" tabs have done wonders for me inbox