On Thursday 15 April 2004 14:14, Gilbert, Joseph wrote: > The largest technical concern I have is the availability of whois servers. > I have already decided to include a caching database in the design of this > tool that will hold entries so that whois servers will not be attempted for > every piece of email being processed by the mail server. This is a very > similiar concept as to DNS caching. If this evolves into a multiple site > deployment, such a caching database could be centralized keeping the load > on whois servers low. However, I am curious as to whether or not whois > servers have blocking mechanisms which will engage if they get so many > requests from a single IP in a certain amount of time. If anyone has data > on this, let me know. Otherwise, I will be using trial & error to > determine whether or not
This has reciently been covered in detail on the spamassassin list. Whois is NOT intended for automated hits, and most whois databases have measures to prevent automated hits. Domain registration still costs money and takes time. Setting up the server also costs money and takes time. Many domains can point to a single server and a single server can be served by multiple IPs. A project has already started to do this in a slightly different way: http://surbl.org/ I think this is a better solution than overwhelming the rather limited number of whois servers. -- _____________________________________ John Andersen ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id70&alloc_id638&op=click _______________________________________________ Razor-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/razor-users
