That way the filter learns, that "he" was right what will improve the detection in prospective. It's a bit of regulary work to start with but over the time the filter will get better and better and need less regulary attention.
Yes, I agree. It is important to flag both SPAM entries but also HAM entries. The filter does not train automatically in the forum.
With flagging ham you mean all entries, that are actually not flagged as spam? I ask, because I am a bit confused by the two options to "report and flag as ham" or to only "flag as ham"? What's the difference?
Trenne niemals Müll, denn er hat nur eine Silbe!