I have been using SpamSieve for a while now. What I have found is that over time - when I tag a lot of spam, the opposite happens; the more I tag, the more spam starts coming through. I know you said you don’t advise to reset the corpus, but I just did that and the spam catching has improved tremendously.
Anyway, my question is, how do you stop spoof emails? I mean ones like “your order from Amazon” etc… These look exactly like the real thing except for maybe a destination link. If I tag those as spam, wouldn’t the real ones be marked as spam?