On Fri, Jul 16, 2010 at 08:06:11PM +0200, Steve wrote: > > -------- Original-Nachricht -------- > > Datum: Fri, 16 Jul 2010 08:09:54 -0500 > > Von: Kenneth Marshall <k...@rice.edu> > > An: Mikael Bak <mik...@t-online.hu> > > CC: postfix-users@postfix.org > > Betreff: Re: Better spam filter for postfix > > > On Fri, Jul 16, 2010 at 02:55:17PM +0200, Mikael Bak wrote: > > > 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 :-) > > > > > > Mikael > > > > > Hi, > > > > Speaking for our environment, we use DSPAM with a pre-trained > > base so that when a user starts initially, they get reasonably > > good spam filter/false positive rates. This means that instead > > of "piles of spam" they have just a few mistakes and the accuracy > > increases quickly from there to the point that the vast majority > > of users have to train perhaps a couple of messages a month. > > > > The initial pretraining is good enough relative to other > > systems that many never train at all. Rule based filtering, > > on the other hand, was very labor intensive for the users > > and fraught with false-positive and negatives. As a member of > > the support team, we have many fewer problems regarding spam > > E-mail since we changed to DSPAM from a purely filter-based > > approach. We use SpamAssassin via amavisd-new and statistical > > filtering such as that provided by DSPAM, CRM114, and others > > do a much better job with much less maintenance. > > > And if I am not wrong that you have a large DSPAM installation. Right? Could > you tell us how many users you have? Is the whole university campus using > DSPAM?
We currently use DSPAM for our campus and have about 15k email accounts. The average number of tokens is less than 20k per person thanks to the pre-trained corpus. Cheers, Ken
