I have an email account at a very well know organization. About a year ago they installed P****p**** to examine incoming email. It reports the messages it catches so that one can examine them if desired. I have have never seen it make a mistake during this year. All the desired messages get through, all the spam gets caught. It works so well that I'm getting so lazy I no longer look at the "catch" reports.
I wish my main email server for personal mail did as well.
I wager the organization pays a handsome sum for this system. It's worth it.
seacue