Spam inside images

[Randal, Phil]

FuzzyOcr 3.4.2 is the way to go.

It's under active development, is well supported, and has a growing
community of users.

Cheers,

Phil

--
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK  

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info 
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Gerhard Mourani
> Sent: 22 November 2006 14:08
> To: MailScanner discussion
> Subject: Re: Spam inside images
> 
> Hello list,
> 
> Thanks for your nice and quick replies, this help me a lot. 
> Erik van der
> Leun recommended to go with the ocrtext patch approch (see 
> further down in
> this message) where Randal Phil talk about implementing 
> FuzzyOcr to do it.
> I would like to know what's the difference between both technic and
> according to users experiences with them, which one is recommended,
> preferable, etc?
> 
> Gerhard,
> 
> > Gerhard Mourani wrote:
> >> Hello list,
> >>
> >> I would like to know if someone know how to make 
> MailScanner scan inside
> >> images for spam. I receive lot of this kind of new spam 
> now. There are
> >> inside the image and cannot be detected by spamassasin 
> which check for
> >> texts only.
> >>
> >> Gerhard,
> >>
> >>
> > 1. cd to /etc/mail/spamassassin
> > 2. download the patch file from:
> > http://antispam.imp.ch/patches/patch-ocrtext
> > 3. type 'patch < patch-ocrtext'
> >    This will create two files in  your current directory called
> >    ocrtext.cf and ocrtext.pm
> >    4. Edit v310.pre and add the following lines:
> >
> >    # OCR - performs Optical Character Recognition on spam images
> >    #
> >    loadplugin ocrtext /etc/mail/spamassassin/ocrtext.pm
> >    loadplugin Mail::SpamAssassin::Timeout
> >
> >    5. Edit the ocrtext.cr file and change the following settings:
> >
> >    ## This points to your gocr binary not just the path.  Try 'which
> > gocr'.
> >    gocr_path       /usr/local/bin/gocr
> >    ## This is JUST the path to your pnm binarys ( i.e. 
> pngtopnm, giftopnm,
> >    jpegtopnm )
> >    pnmtools_path   /usr/bin
> >
> >    6. Run spamassassin -D --lint  and check for errors.
> >
> >    If all went well restart spamassassin or force it to 
> reread it's config
> >    however you would on your system.
> >
> >    Then try typing something like 'tail -f /var/log/mail.log | grep
> >    SPAMPIC_ALPHA', on a high volume server you should see some rules
> >    matching after a few minutes.  If so then you are 
> OCR'ing the images!
> 
> -- 
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