> Yahoo's FBL works on DKIM signatures. Are you 100% sure that all the mail > you're sending has > signatures from domains you've signed up to get reports?
Yes, we serve 6 domains, all have correct DKIM signatures and all are enrolled in Yahoo's FBL. Have never received a single report from the FBL. Which is unsurprising because we do not send any unsollicted or bulk email. I can only conclude that Yahoo's error message "TSS05] Messages from x.x.x.x temporarily deferred due to unexpected volume or user complaint" is 1) a catch-all message which does not actually describe the true reason for the "temporary deferral", or 2) a sign that Yahoo blocks (or temporarily blocks) IP ranges without actually having evidence that every single IP in that range has behaved badly, or 3) a sign that the FBL does not work in the sense that not all spam reports received by Yahoo lead to a message through the FBL. Assuming Yahoo knows what they are doing (and I have no reason to assume they don't), my bet is on 2). Thanks, Kasper
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