--On Tuesday, December 2, 2008 12:23 -0800 Marc Perkel <[EMAIL PROTECTED]> wrote:
You query hostkarma.junkemailfilter.com Not listed = new (new to us anyhow) 127.0.2.1 = last day 127.0.2.2 = last week 127.0.2.3 = older than a week OK - so here's the rub. This catches 100% of all new domains. But - it will have false positives because if an old domain has never emailed anyone we filter for then it would also be considered new. We keep 40 days of data. So - this list might be useful as long as it was combined with additional tests (probably spambot tests) as a score enhancer.
It's analogous to greylisting, to say that if we have not seen this domain in the past N days, we tempfail, or score, or something. However I think it would be better to have a software package that implements this, rather than a remotely managed list, since each system would have its own set of domains that it sees frequently (or that it wants to whitelist permanently). Joseph Brennan Columbia University Information Technology
