That said, I have another question. Where can I find a definition of the four numbers in the surbl (and others) scores in 50_scores.cf? Assigning a single score for MAPS is simple enough, but what are these?
score SPF_SOFTFAIL 0.500 0.842 0.500 0.500
From man Mail::SpamAssassin::Conf in describing the "score" option ------------
If only one valid score is listed, then that score is always used for a test.
If four valid scores are listed, then the score that is used depends on how SpamAssassin is being used. The first score is used when both Bayes and network tests are disabled (score set 0). The second score is used when Bayes is disabled, but network tests are enabled (score set 1). The third score is used when Bayes is enabled and network tests are disabled (score set 2). The fourth score is used when Bayes is enabled and network tests are enabled (score set 3).
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