many PTR checks false positive?

  • since yesterday we have many customers which reporting emails from icloud, 1und1 etc. could not reach them because:
    Recipient address rejected: Mail appeared to be SPAM or forged. Ask your Mail/DNS-Administrator to correct HELO and DNS MX settings or to get removed from DNSBLs; in rhsbl.ahbl.org


    But policyd-weight is not using rhsbl.ahbl.org or is there something in spamassassin plugin which checking rhsbl.ahbl.org?
    So far as I know rhsbl.ahbl.org stopped their service