[Mimedefang] LOTS of mail being tagged wrong

[Sevo Stille]

Håkon Nilsen (Exinet AS) wrote:

> I just added new domain relaying through my mailserver. The users are ship
> brokers, and receive a _lot_ of mail from around the world. The problem is
> that lots and lots of the mails are tagged as spam.

That is the core problem with server side Bayes filters - they work best 
on a individual users mail, or with groups with common habits. Adding 
new users with a set of different communication partners, languages and 
habits may put your database off the track.

> Bayes tages it worth 5.4 points. My limit is 5. How does Byes tag it this
> much? What should I do to solve the issue? 

The easy way would be to let the mail through, spam-tagged, and let your 
users collect and report all mistagged mail, to retrain the filter on 
them - after a while, the filter should adjust. If you need a more rapid 
and complete solution, trash your current Bayes database, and get your 
users to collect two sets of mails that are positively spam or ham. And 
train a new database on these mailbox folders.

Sevo

-- 
Sevo Stille
sevo at radiox.de