Here are the Spam rules and headers from one of my e-mails that a kind postfixer sent me:
You're not a spammer.. your kind postfixer just has a broken setup and doesn't realize it.
First, it appears the kind postfixer has a broken trust path. The copy of SA is failing to realize the mail was relayed. Your messages don't match any of the DUL or DYNABLOCK lists on a properly configured server, but broken trust paths can cause SA to think that your ISPs mailserver is actualy part of the postfixer's network, not the ISP's network.
Second, to add insult to injury, this kind postfixer reduced the score of BAYES_00 to nearly 0, effectively poisoning his own site with a serious pro-spam bend.
Had he even been using the default SA 3.x score for BAYES_00 (which is -2.599) the message would have ducked under the threshold and not have been tagged. Instead, he's zeroed the score, probably because of FN problems due to poor training, and is causing all kinds of scoring havok.
If bayes isn't working, disable it, but don't zero out the scores of the extreemes.. that's asking for a copious quantity of trouble.
Might I suggest recommending that the postfixer fix his postfix?
