This service employs questionable methods. IP addresses and entire networks are frequently listed in their secondary services without accountability from the actual sender. They also provide a paid 'express delisting' option, resembling a pay-to-remove scheme rather than a legitimate anti-spam solution. Many administrators view this tactic as unethical and unreliable, and numerous mail providers do not regard these listings with seriousness. I advise against paying for their services or depending on their lists.
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