I was thinking the same thing. It would be really interesting if it went into details about which aspects of the message were considered spam-evidence, and how

I was thinking the same thing. It would be really interesting if it went into details about which aspects of the message were considered spam-evidence, and how strongly they weighed in the decision. That might not be a particularly useful feature, and Google might consider the specifics of its spam filter to be trade secrets, but it would sure be interesting.