For all email addresses that I have flagged as spam, anytime an email arrives from one of these senders, do not place the email into spam. Either reject it outright or immediately delete it. This could be a feature flag that the user can enable or disable.

It's tiring seeing my spam folder with 1000's of known spam messages as I try to look for something that may have landed there in error.

If I've explicitly flagged a sender as spam, I do not need to know that a message has come from that sender. It should be automatically discarded - or even rejected as perhaps an unknown email address.