Re: New DNS Black list, White List, Yellow List

[Marc Perkel]

John Andersen wrote: On Sunday 23 July 2006 07:25, Brent Kennedy wrote: But based on its current setup, spammers who probably read this list, will most likely just feed good feedback about their mail servers through those servers and corrupt the data. And spammers already sign up with every isp they can find and forward a few clean messages thru each one, then dump a huge load of spam till they get caught, and simply walk away from the account (usually with an unpaid bill). Ask any ISP abuse admin. That will serve to poison the whitelist, leaving it with nothing but a few corporate mailers, as every general purpose ISP will fall into the yellow list in short order. Similarly, the blacklist will be fairly useless, because the companies that specialize in spam-safe hosting can get an new IP in a heartbeat, and can rent IPs all over the world. When they move on, (and they move rather quickly) you are left with a list of IPs that "at one time" may have been used by a spammer. Finally, the blacklist does not solve any problem not already handled by SURBL, and the other black hole lists. The white list is fairly well handled by SPF. The Yellowlist is what you need SA for now, and this is unlikely to reduce that need in any significant way. To the extent there is any merit in it, it should be merged with SURBL. An ISP wpuld never be whitelisted anyhow. Whitelisting is for things like banks and other institutions and organizations that produce no spam. Yellowlisting is for ISPs so that they don't accidentally get blacklisted. SPF is useless because few are using it due to the fact that it just doesn't work.