YAHOO spam filters should be able to remove spam that begin with "newsletter", "offer", "no reply" or "noreply", as the SENDER.
And should also have a filter to remove spam that has a domain ending with repeated word(s) or phrase of "office", "shop", "mom", "dept". or "store". Yahoo shows a filter choice to select for beginning with or ending with but they have yet to stop any of the repeated spam I have been receiving when filters have been set. If these filters were working correctly the account user would be able to filter a lot of spam that tends to fill Blocked Senders and Domains freeing up space on those lists to cover more incoming spam!
C T Owen commented
It is like beating a "dead horse", YAHOO+ Users understand that spam is a very big issue and that spammers change how they send their attempts to mislead the User to phish them into their clutches but that should make Yahoo equally attentive in keeping such spam out of the equation before such even gets to any User email account. Why must every platform/provider force the Users to report/notify/delete/sort such email for themselves after they are reported millions of times?