Aaron Boyles wrote: > This sounds along the lines of what I'm looking for. Is there an RFC on > this protocol anywhere, and a list of some free servers hosting the > information? >
As for an RFC, none that I know of. The best you might get would be the sendmail docs, because it is sendmail's built-in IP query format that most blacklists support. As for a list of public servers, take a look at the rules in SA's 20_dnsbl_tests.cf for a list of good ones. If you want a more comprehensive list, check the "spam database lookup" on www.dnsstuff.com.
