On Monday 06 June 2005 10:22, Bob Brennan wrote: > I've been called in to solve some massive email problems in a > company that has about 30 employees and an external mailserver. > They receive on average about 100 legitimate emails per day and > 3000+ spams plus the usual virus and worm attacks. > ...... > My question is - long term - is it better to set up the > mailserver to reject all non-mailbox emails to cut down on the > incoming processing load; or to filter and bit-bucket the spam in > the hopes that the volume will decrease over time with no > responses to the spam? Or any other techniques any of you are > using for such problems? > > Thanks in advance for opinions/suggestions, > bob Take a serious look at greylisting. I suspect that you can reduce your spam load to almost insignificant proportions with that alone. Here is a good description of the technique: http://projects.puremagic.com/greylisting/whitepaper.html and a particular implementation I have used to good effect: http://hcpnet.free.fr/milter-greylist/ Regards, Mike Klinke
