Antispam blacklists

stanchina.net is located in my closet and is connected to the world through an ADSL line on dynamic IP: that pool of dynamically assigned IP addresses is blacklisted by many RBLs because it is considered "unsafe" by default.

I already knew that, so I'm routing all outgoing mail through my ISP's official SMTP server. The problem is, some of my ISP's load-balanced SMTP servers are also in some blacklists because they sent out a few spam messages. 20 or 30 messages. Not millions. Not even thousands. Come on... How can that be the sign of a spam-friendly ISP? It's a nationwide ISP with millions of customers, so 20 or 30 messages are statistically irrelevant; it might just as well mean that 20 or 30 people incorrectly tagged a message as spam.

I really really really believe that spam is bad, but I also believe that those blacklists are causing more harm than good by being overzealous. I'm using SpamAssassin myself (version 3.0.2 currently), but I only use the statistical tests because I found that the blacklists are mostly useless and causing too many false positives.

$Id: blacklists.gtml,v 1.1 2005/10/22 10:51:24 flavio Exp flavio $