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How the spammers find youHow the spammers find youPosted Apr 17, 2003 17:08 UTC (Thu) by cpeterso (subscriber, #305)In reply to: How the spammers find you by hansl Parent article: How the spammers find you what happens when the IP address of the spam origin mailserver belongs to AOL? Should you block all AOL users? ok, AOL might be a bad example, but blindly blocking any mailserver might be too aggressive.
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How the spammers find you Posted Apr 18, 2003 13:06 UTC (Fri) by hansl (subscriber, #5086) [Link] I should have mentioned that besides the blacklist we also maintain awhitelist where most mailservers are listed now from which we have received one or more legitimate emails. I agree that this is a forceful method, but since the introduction of DNS blacklists a couple of years ago spammers have not been sitting still, and are moving towards the use of dial-up networks on which they try to plant trojans and virii that will act as spam injectors. Blocking dial-up networks is not too agressive in my opinion, since you can expect ISP's to provide an MTA to their customers (that usually sits outside their dial-up range). You can trust most ISP's mailservers like AOL's a lot better than Joe User's PC running LookOut. And I've found that when it happens that an ISP's mailserver does get blacklisted, they're usually very fast at correcting the situation. They have an incentive to do so, because it being blocked makes a lot of customers unhappy...
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