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This paper has presented a detailed study of spam campaign orchestration as observed in the wild. Their investigation was enabled by a long-term infiltration of the Storm botnet, comprising both passive probing and active manipulation of the botnet's C&C traffic. Their study includes over 800,000 spam templates, more than 3 million harvested email addresses, and target lists comprising more than 630 million email addresses from 94 different campaign types hosted over a period of 10 months. Their analysis confirms that today's spamming business operates at a frightening scale without requiring truly sophisticated mechanisms to conquer the hurdles put in place by the anti-spam industry. Thus, to the detriment of productivity worldwide, the filtering arms race continues.
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