Loren Wilton wrote:
Nice analysis, Loren. The only nit-pick I would make is that many spammers have valid SPF records set up, usually I believe "v=spf1 +all". A quick grep through my last 4000 spams shows 345 with SPF_PASS hits. That is actually significantly higher than the number of spams that hit SPF_FAIL. I believe that is why it is scored -0.001.1. Why did it get SPF_PASS if it is spam?
