Spam inside images

Mike Kercher mike at vesol.com
Tue Nov 21 15:52:33 GMT 2006


 

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info 
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Erik van der Leun
> Sent: Tuesday, November 21, 2006 9:12 AM
> To: MailScanner discussion
> Subject: Re: Spam inside images
> 
> 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!
> 
> --

I followed these instructions and can't get around:

(Can't locate object method "ocrtext_eval" via package
"Mail::SpamAssassin::PerMsgStatus" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/PerMsgStatus.pm line
2638.

Thoughts?

Mike


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