On Sun, 18 Apr 2004, Iljitsch van Beijnum wrote:
It would be important to make this a list of legitimate SMTP hosts only, and NOT a list of non-spammers, as the former can be determined through technical means (1) and the latter is open to endless debate. (As we can see with pretty much all existing blacklists.)
However, spamtrap-driven blocklists can use such a list to be less aggressive in listing said SMTP hosts. In fact, I've been planning to create such a list myself, in order to reduce the false positive rate of the PSBL. Guess I'll have to let NANOG know when it's up and running. I am planning to use some of the DSBL server side software to implement such a "white"list here, with the extra that admins can specify the preferred abuse address for the IP addresses they add to the list. 3 years ago, I'd have never thought that mail servers would be a minority of the SMTP senders out there, but here we are ... Rik -- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan