Apparently some anti-spam filtering services throttle down traffic from Gmail and Yahoo networks. This is due to the reports from security firms that the Windows Live CAPTCHA, or “Completely Automated Public Turing test to tell Computers and Humans Apart”, used by Hotmail and an equivalent system used by Gmail, have been cracked by automated attacks. The Register also reports that “Cyber criminals are employing sweatshops in India for as little as $4 a day to defeat anti-spam security checks, according to a recent analysis by net security firm Trend Micro. It reckons miscreants prefer to hire cheap labour rather than using automated techniques to defeat CAPTCHAs”
Google recently acquired Postini, which is one of the leading email security and filtering systems in the world. Postini not only filters incoming traffic and emails but also outgoing as well. You would think this service would help deter from this type of abuse. I personally have experience with Postini’s service as the company I work for is a Postini partner. It’s a great service that filters incoming and outgoing traffic alike with optional email encryption/archiving. We have converted many customers from software based anti-spam software to this service and its been a huge improvement. About as good if not better than the Barracuda devices. Better actually because it doesn’t even reach your network or consume any of your network resources. I’m beginning to sound like a Postini sales rep now so I’m going to stop. I’m not sure if Postini has the resources to filter out the entire Gmail network, but I would presume Google would have integrated this service with their data centers to help cope.
courtesy: compaholics
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