Re: [exim] SPAM Filtering - Losing the war!

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Auteur: Peter Bowyer
Date:  
À: Exim, Users
Nouveaux-sujets: [exim] Exim based FuzzyOCR
Sujet: Re: [exim] SPAM Filtering - Losing the war!
On 25/10/06, Marc Perkel <marc@???> wrote:
>
>
> Peter Bowyer wrote:
> On 25/10/06, Marc Perkel <marc@???> wrote:


> Wakko Warner wrote:


>
>
> Have you tried gocr? I have, it's not the greatest, but it is possible
> that

it can read the image and allow you to react on the content of the
> image.

It's not that great yet, but I think it could have potential (until
> spammers

start using the other characters in the images like they are in
> text spam)




> I have started to install it several times and got distracted. I think
> I

will try it.

> We've just implemented the FuzzyOCR plugin for SA, which uses gocr

under the
> covers. It's catching 100% of the current wave of image spam

with no FPs
> reported yet. Very impressed.


Since the OCR is farly expensive I might look
> at pulling out the SA

plugin bits and implementing the guts as a perl module
> to call

directly from Exim (before SA), where I can be a bit more choosy
> about

which attachments I choose to process.

Peter



>
> That would be great if we can create an Exim equiv of the Fuzzy OCR code.
> I'd rather drop it in Exim so that SA never sees it and therefore never gets
> to poison my bayes filters.
>


Agreed - the example posted earlier is by its own admission not
'fuzzy' - I'll do some testing on it and see how it performs. Maybe it
needs a bit of the fuzziness from FuzzyOCR.

Peter

--
Peter Bowyer
Email: peter@???