Reviewing ham scores??

[Ken Scott <ke...@geodax.com>]

I just saw on the list a question from a fellow who saw that some ham
messages were  triggering certain rules.  My questions is, how can I
easily see that sort of data?  All I know to do is to save a interesting
ham message as a file and run at the command line something like:   
#spamassassin -t < testmail  (I think) 

That is slow and inefficient (one message at a time) when what i'd
really like to do is run it on a whole mail folder and see the scores
and what rules are hitting etc.  It seems there is some apparently
obvious way to do this that i have not yet figured out.  If someone
could give me "the keys to the kingdom" I'd really appreciate it.  Maybe
it has something to do with mass-check (which I just installed  today) 
but I am not sure.
Thanks 
Ken