> 2. As mentioned above the whois data is sometimes populated *after* the > domains > start appearing in spams. Remember that the whois data is still mostly batch > processed once or twice a day. Many of the TLD zone files (where the DNS > delegations actually come from) are updated in near real time. IOW the whois > data can significantly lag usable domains.
I'd be tempted to try using the whois data as the basis for a RHSBL not-blacklist (i.e: if the domain name DOESN'T match the RHSBL, then it's not old enough to accept mail from). However, as a practical matter we'd be talking about a multi-gigabyte zone file and I expect that would prove a little problematic for whatever sucker^H^H^H kind soul ended up hosting the thing. -- Dave Pooser Cat-Herder-in-Chief, Pooserville.com "...Life is not a journey to the grave with the intention of arriving safely in one pretty and well-preserved piece, but to slide across the finish line broadside, thoroughly used up, worn out, leaking oil, and shouting GERONIMO!!!" -- Bill McKenna