Comment by MisterTea

> Unfortunately, that means that attempts by those larger providers to combat spam using such reputation will naturally hurt smaller providers.

Indeed. I am on a few mailing lists and many people on them host their own email. I use Gmail so that means visiting my spam inbox once a day to click "not spam" upward of a few dozen times. Day in and day out, same people end up in Googles spam folder. It's bullying and sabotage.

> No one says to themselves "Huh, this is from a Gmail address, it must be legit".

Indeed. I get a shit load of spam from google addresses so reputation is not there.

> We really want to keep track of sender reputation.

This is the hard part but I do think it's something to think about. I should be able to get an email from a known sender every time without $emailprovider making that decision for me. Some sort of attached signature or key that is proof of sender identity so I can route that right into my inbox.