Martin Blapp wrote:
> Hmm, the SA and rules du jour stock and obfu rules suck ;-) Beside that,
> I also match some words which are 100% legitimate. And the OCR words
> are often truncated so one must match those too.
But the real key is Bayes. Adding the OCR words to Bayes will be a real
advanta
Hi,
be something to be gained by running the OCR scan from mimdefang?
The idea would be to run the scan, and if sufficient text results
(I'd hesitate to suggest that a quick spelling scan would be run on
the result, but that is a possibility) that this text is written
by MdF into a new text att
Late follow-up to this thread ... was wondering if there might
be something to be gained by running the OCR scan from mimdefang?
The idea would be to run the scan, and if sufficient text results
(I'd hesitate to suggest that a quick spelling scan would be run on
the result, but that is a possibili
Nels Lindquist wrote:
> As far as spammers obfuscating their images, couldn't that be worked
> around by tying OCR into the bayesian system?
I think the original idea was to obfuscate the images so people could
read the text, but OCR tools wouldn't be able to.
> Then obfuscation wouldn't matter
On 14 Apr 2006 at 18:42, Martin Blapp wrote:
> This is just a little advertisement for my plugin which is now
> in a usable state and works very well.
>
> Anyone interested should keep an eye on it - it really helps
> with the image only spam we get today. But problably the spammers
> will soon c
So far in my tests, this OCR plugin looks like it's working ok. I rounded
up the needed prereqs (that was a bit of a chore, but everything compiled
cleanly), and changed the package definition as indicated in Martin's post
(be sure to run "spamassassin -D --lint"). So far I've seen several hits
f
Dave Williss wrote:
>- Original Message -
>From: "Gary Funck" <[EMAIL PROTECTED]>
>To:
>Sent: Sunday, April 16, 2006 6:34 PM
>Subject: RE: [Mimedefang] Image validator/OCR SA plugin
>
>
>
>
>>Martin wrote:
>>
>>
>
- Original Message -
From: "Gary Funck" <[EMAIL PROTECTED]>
To:
Sent: Sunday, April 16, 2006 6:34 PM
Subject: RE: [Mimedefang] Image validator/OCR SA plugin
Martin wrote:
But problably the spammers
will soon change their tricks to different images which are more
d
Martin wrote:
> But problably the spammers
> will soon change their tricks to different images which are more
> difficult to read :-(
>
> http://antispam.imp.ch/patches/patch-ocrtext
On this topic, Nick FitzGerald mentioned this article,
http://www.jgc.org/blog/2006/01/do-spammers-fear-ocr.html
S
> From: Martin Blapp
> Sent: Friday, April 14, 2006 9:43 AM
>
> This is just a little advertisement for my plugin which is now
> in a usable state and works very well.
>
>
> http://antispam.imp.ch/patches/patch-ocrtext
>
Martin, this is a Very Good Thing, and has been needed for quite
some t
Martin,
I installed your plugin for testing, but found that it would not load
correctly on my system, giving the error:
[5631] dbg: plugin: loading Mail::SpamAssassin::Plugin::ocrtext from @INC
[5631] warn: plugin: failed to create instance of plugin
Mail::SpamAssassin::Pl
ugin::ocrtext: Can't lo
# grep HTML_IMAGE_ONLY /var/log/maillog | wc -l
35834
This is wrong. It should have been
# grep "HTML_IMAGE_ONLY.*hits=" /var/log/maillog | wc -l
17917
But almost 45% of all mails match HTML_IMAGE_ONLY, so it's unusable
at all. I even use lower scores for those rules now - which gives
m
Interesting... What's the performance like with this? How many messages
do you scan per day with it?
It is rather fast. On a Pentium IV 3Ghz I can scan a average jpg/gif picture in
0,2 - 0,3 seconds.
I've limited the scantime to 5 seconds per image, and I allow only three images
to be scanne
On Apr 14, 2006, at 9:42 AM, Martin Blapp wrote:
Anyone interested should keep an eye on it - it really helps
with the image only spam we get today. But problably the spammers
will soon change their tricks to different images which are more
difficult to read :-(
I can see it now ... pretty s
On Fri, 2006-04-14 at 18:42 +0200, Martin Blapp wrote:
> Anyone interested should keep an eye on it - it really helps
> with the image only spam we get today. But problably the spammers
> will soon change their tricks to different images which are more
> difficult to read :-(
Interesting... What's
Martin Blapp wrote:
> http://antispam.imp.ch/patches/patch-ocrtext
That is unbelievably sweet.
I remember a couple of years ago there was a virus that sent itself in a
password-protected .zip file, with an image containing the password. OCR would
have been useful... I could easily see MIMEDefa
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