zcscjin Posted May 30, 2010 Share Posted May 30, 2010 According to various reports, more than 80% of global spam are being sent by botnets, which are groups of malware-infected computers controlled by hackers. We can not possibly reduce spam without reducing the size of botnets first. As I see it, SpamCop can make a unique and valuable contribution in this regard. I came to this forum because SpamCop was listed as a major user of greylisting. Greylisting has been known to be very effective at reducing bot-sent spam, but most of its applications stop there. If we think about it, of those IPs which couldn't get through greylisting, some of them might be misconfigured mail servers, but the majority are very likely to be part of spam-sending botnets. So every greylisting installations is in fact also a botnet detection system. While SpamCop may not have the largest greylisting system (the largest one I know fended off about 460K connection attempts per day in 2005), the existing communication channels with ISPs, which few other greylisting installations have, is SpamCop's unique strength. If SpamCop has not already done so, I suggest that SpamCop start to identify suspected botnet computers with greylisting, and report them to relevant ISPs. It will reduce not only spam, but also identity theft, data leakage, and DDoS, etc. This will no doubt make a positive impact on the Internet. Link to comment Share on other sites More sharing options...
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