Bayesian filtering is still to "iffy" for my liking. There is a greater risk of "false positives" and the dynamic's of spam change frequently enough to avoid filtering (for periods of time). Finding a few good quality ORDB's has meant that I'm blocking ~35% of all email's - spam still gets through, but its significantly lower and there is no chance of a 'false positive'. To compensate for known clients having a listing on one or more of the ORDB's, we white list all known correspondence with a dump from the CRM product we use (automating this is a 'to-do'). As we initiate new business, we send the first email, its in our database (or should be if staff follow correct procedure) so its white listed. Nothing important is blocked. Show me a Bayesian filter with a proven track record of no false positives and I may think about looking at it - but I probably won't - the system I'm using ain't broke, so I'm not going to fix it :) Anthony. > -----Original Message----- > From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] > Sent: Thursday, 3 June 2004 10:16 > To: [ISAserver.org Discussion List] > Subject: [isalist] RE: OT: Why Friends Don't Let Friends use RBLs > > > http://www.ISAserver.org > > Hi Anthony, > > How does your use of an RBL on your network reduce overall bandwidth > utilization on the Internet link? How are they superior to a good > Bayesian filter? > > Thanks! > Tom > > -----Original Message----- > From: Anthony Michaud [mailto:anthonym@xxxxxxxxxxxxxx] > Sent: Wednesday, June 02, 2004 7:11 PM > To: [ISAserver.org Discussion List] > Subject: [isalist] RE: OT: Why Friends Don't Let Friends use RBLs > > http://www.ISAserver.org > > > > > -----Original Message----- > > From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] > > Sent: Wednesday, 2 June 2004 11:22 > > To: [ISAserver.org Discussion List] > > Subject: [isalist] OT: Why Friends Don't Let Friends use RBLs > > > ~~~~~~~~~~~ Clip from Fred Langa Newsletter ~~~~~~~~~~~~~~ Kennedy > > Space Center Blacklisted I won't bore you with the rationale of why > > broad-brush "blacklist" tools are bogus--- I've covered the > inherent > > flaws in this approach many times before. ( > http://langa.com/u/4v.htm > > ) But I admit to a perverse pleasure in emails like this, > which show > > just how utterly stupid SPEWS, MAPS, SpamCop and the rest > really are: > > > > Three times this year all of the e-mail from Kennedy Space > Center was > > blocked by our county's largest broadband ISP (RoadRunner). > They have > > done so because of a large quantity of mail coming from a > single user > > > or because one or more of the following third party spam > > *snippage* > > I love these rants. Who I accept email from is *my* choice, based on > the lattitude that I have been given in my role. If your company has > sent unsolicited emails, I don't want 'em. If your ISP has > done it, or > a customer of the ISP's - the ISP needs to be contacted by you and the > ISP fix it. I use dynamic RBL's, that have a quick turnaround on > removal of blocks, so when your mail system is secure again, then you > can talk to me. Don't fix it, then get on the phone or fax. > > Its *my* mailserver. Its *my* bandwidth. Its not free and > the spammers > / virus writers aren't paying for the bandwidth they waste. > > I just love those that think they have a god given right to > send email - > which is not the case. > > Anthony. > > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist > ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp > ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Other Internet Software Marketing Sites: > World of Windows Networking: http://www.windowsnetworking.com Leading > Network Software Directory: http://www.serverfiles.com > No.1 Exchange Server Resource Site: http://www.msexchange.org Windows > Security Resource Site: http://www.windowsecurity.com/ > Network Security > Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: > http://www.ntfaxfaq.com > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe visit > http://www.webelists.com/cgi/lyris.pl?enter=isalist > > > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist > ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp > ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Other Internet Software Marketing Sites: > World of Windows Networking: http://www.windowsnetworking.com > Leading Network Software Directory: http://www.serverfiles.com > No.1 Exchange Server Resource Site: http://www.msexchange.org > Windows Security Resource Site: http://www.windowsecurity.com/ > Network Security Library: http://www.secinf.net/ > Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion > List as: anthonym@xxxxxxxxxxxxxx > To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist