Spam inside images

[Gerhard Mourani]

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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