Microsoft revised the CAPTCHA on their hotmail account sign up process, Not long after, Spammers using Anti-CAPTCHA techniques use bot nets to bust the captcha and create accounts from the botnet victims un-blacklisted, clean I.P addresses.
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Websense Security Labs ThreatSeeker™ technology has discovered that spammers in their recent tactics have drawn their attention towards traditional and infamous Hotmail, aka Live Hotmail services after the streamlined Live Mail Anti-CAPTCHA operations.
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