-----Original Message-----
From: guy keren [mailto:[EMAIL PROTECTED]

> i'm beginning to think i'm asking for the imposible - to filter the
> letter, i need to first download it. however, i should be able to filter
> out by the message headers that _are_ downloaded by imap, thus eliminating
> a large part of the spam, and only then downloading the rest of it for
> further inspection...
>
> oh, well. no spam solution for me...

Actually there is.

http://spambayes.sourceforge.net/applications.html#imap

I'm using the Outlook plugin version, and it works great.

Basically what they say is that there are two folders: Decided spam
and Suspected spam. There are two thresholds, spam threshold and
suspect threshold. The suspect folder is intended to catch all those
messages that are undecided for the purpose of training (and initially
they are all suspect). After some training it gets really good at it.

The application is an IMAP proxy. You set it up on some port, and connect through it. 
It senses when you move mail to the spam folder or from the
suspect folder into the inbox folder and considers that to be traininig.

-- Arik
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