Osirusoft, one of the largest anti-spam blacklists, has been shut down by its operator following a barrage of massive Distributed Denial of Service (DoS) attacks that have crippled the service. Services such as relays.osirusoft.com have come under fire recently for blocking legitimate email as well as spam. The service used a variety of techniques to maintain a real-time dynamic list of IP addresses that are known to have spam originate from them. By using the list in real time, a mail server can determine if it should accept and process a message or disregard it as spam. Managing director of Australian broadband provider Ideal Internet Services, Darren Worley, doesn’t use blacklists as a general rule. “We don’t use them for various reasons… it’s about controllability. You’re passing control to some other entity, and if you’re not in control of your own mail servers then it’s a problem for your own business.” Full Story
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