On Monday, October 30, 2006, 9:56:49 AM, Wolfgang Uhr wrote: > The test contains the examination of all links in the body. You have to > get the date of registration and to calculate the age of this urls.
> Of course for practal use you have to cache thoose whois-requests onto a > central server and to provide a complete series of mta's. Generally speaking whois queries is a poor way to determine domain age, at least for client applications. The whois infrastructure is simply not designed to support the volume of queries required, even if locally cached. Other problems: 1. Inconsistent record formats 2. Rate limits much lower than the number of domains registered or kited/tasted each day. http://www.bobparsons.com/DomainKiting.html 3. Unavailability of whois for some TLDs A centralized server would be better, but still subject to some of the problems above. As a general concept domain age is a pretty good measurement of spam potential, but it's by no means 100%. As others have noted the false positive potential is pretty high. Jeff C. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
