-------- Original-Nachricht -------- > Datum: Fri, 16 Jul 2010 14:55:17 +0200 > Von: Mikael Bak <mik...@t-online.hu> > An: postfix-users@postfix.org > Betreff: Re: Better spam filter for postfix
> Steve wrote: > [big snip] > >> So you have made your point. You prefer (or are required) to have user > in > >> control. > >> > > Yes. The big problem is that no solution out there is 100% accurate for > all users. So the only way to make the user happy is to delegate the > control to him. > > > > Can't speek for all users. But I have the impression that users don't > want to go through piles of spam and take action. They just expect the > damn spam filter to work by itself. > > At least our users expect this :-) > Mine do the same. At least the bigger part of them. Learning a Anti-Spam filter is something that they consider "black magic" and anyway they have no time to do that. They want just good mails to arrive and bad to never reach their box. Often they them self don't know 100% what good and what bad is. But regardless they expect the Anti-Spam filter to know for them. So this is the reason I use something that allows me to train one dataset which is then merged at runtime with the individual user data. And since I know to code I have no problem to add additional small code that does the training automatically for them by using various techniques. So far most of my users NEVER see a spam mail in months. I have accounts that are 100% Spam free for over a year. And I have accounts that have never complained about false positive for ages. But then I have accounts that are not so easy to handle. One customer is in the steel trading business. Boy, boy, boy... some of those steel producing companies from eastern Europe or from Asia are always at least on one or more blacklists, have bad HELO/EHLO, no reverse DNS entries, failing on SPF and and and... Using something like greylisting is no option either because that damn steel price can change a bunch of cents in minutes and then multiply that with a gazillion of kilos a ship can transport and there you are: a lot of money can be lost by holding back a mail for 2 Minutes. Getting such a domain Spam free is a challenge. And so far only statistical Anti-Spam filters where capable to handle that for me. Forget SpamAssassin, forget the "cheep" tools that you can put in front of Postifx, etc. They all fail. Some more, some less. So you need to be very creative and thinking out of the normal border to get your job done when filtering such a domain. > Mikael > Steve -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
