North American Network Operators Group|
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Re: Anti-spam System Idea
Sean Donelan wrote: > DialUp Lists (DUL) dns block lists permits you to ignore e-mail from > many dynamic IP addresses. You can configure your mail server to do this > today without waiting for ISPs to do anything. > > Like most other "simple" solutions, how effective is it? We block known dialup netblks. Catches < 5% of spam. Why? Because the real culprits are xDSL, CABLE and other systems with broadband connections. These account for about 80% of the spam attempts we observe. The idea here is not just to prevent the receipt of spam (which is what DNSBLs can accomplish), rather, it is to prevent the generation of spam that is accounting for such a growing amount of everyone's network traffic. If you block the ability of non-legitimate MTAs (such as open proxies and spamiruses) to send spam, you reduce the network bandwidth waste that spam is consuming. (As a side effect, you would also reduce the spread of viruses by email.) -- Jon R. Kibler Chief Technical Officer A.S.E.T., Inc. Charleston, SC USA (843) 849-8214 ================================================== Filtered by: TRUSTEM.COM's Email Filtering Service http://www.trustem.com/ No Spam. No Viruses. Just Good Clean Email.