Bounce handling simplified
I am a strong believer that bounce handling should be designed to remove addresses that have no human on the other end while not removing addresses that have a real recipient on the other end.
Bounce handling should be designed to appropriately manage your subscriber base. Delivery problems are the consequence if you don’t do that. They shouldn’t be the reason you bounce handle, though.
My experience tells me that senders that think about the impact of their sends can do things that “break the rules” while still being respectful of their subscribers and still see good delivery.