On Tue, 10 Dec 2002, Eric S. Johansson wrote: > blacklists are fundamentally wrong. They break end to end connectivity > of the net and nab a fair number of innocent users (i.e. telecommuters, > small-scale mail systems etc.) in addition to catching the occasional > spammer.
Do I think DNS block lists are a perfect solution? No, I dont. But FWIW, my experience is that we see a very low rate of false positives. We parse out the Gnatbox log (Heh. with a Python script :) and do reverse DNS lookups on the rejected IP and put it into a daily mail that I review. As a (very) small example: bl.spamcop.net - out4smtp8.ddc.dartmail.net - 216.73.90.48(15) bl.spamcop.net - out12smtp3.ddc.dartmail.net - 216.73.90.123(14) bl.spamcop.net - ing1.easylistdpoffrs.com - 64.70.44.11(2) bl.spamcop.net - mtsbp529.email-deliveries.net - 209.236.59.6(2) bl.spamcop.net - out4smtp5.ddc.dartmail.net - 216.73.90.45(14) bl.spamcop.net - out-spire-01.greatdealsdepot.net - 66.240.153.4(2) bl.spamcop.net - lsanca1-ar3-153-094.biz.dsl.gtei.net - 4.33.153.94(3) bl.spamcop.net - om40.yourmailsoure.com - 216.109.73.35(1) Im pretty comfortable that most of that is darn likely to be crap. > I advocate instead a movement towards sender pays e-mail. In other words, > and e-mail originator would be required to burn CPU cycles in a proof of > work puzzle or actual cash attached to the mail message. On receipt of said > payment, the originator would be white listed so they wouldn't have to > provide postage for future communications. I think its fair to say that one of the underlying reasons for spam is the delivery costs are trivial for the sender as opposed to the recipient. Changing that is probably a good thing. Unfortunately, that is not a change that is going to happen in the short term. I have oodles of porn/mortgage/viagra/RC car spam that is wasting my users time, right now. The DNSBLs give me a way to reduce that, today, with (for us) minimal downsides. YMMV, etc. Joe Matuscak Rohrer Corporation 717 Seville Road Wadsworth, Ohio 44281 (330)335-1541 [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] To subscribe to the digest version first unsubscribe, then e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Archive of the last 1000 messages: http://www.mail-archive.com/[email protected]
