Re: Image spam and Bayes problem

2006-12-13 Thread René Berber
Gary W. Smith wrote: I’ve seen a sharp increase in our OB Ticker spam’s that consist of an image and some text. It passed the greylist just fine and was labeled as bayes_00. X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00,EXTRA_MPART_TYPE,

Re: New RBL idea regarding image spam

2006-10-26 Thread Theo Van Dinter
On Wed, Oct 25, 2006 at 10:18:44AM -0500, Bill wrote: Ok, if the image spams all have a different hash wouldn't that make the Hash function built into Fuzzy OCR useless as well? I'm not sure I buy into that thinking. The hash option in my Fuzzy OCR setup runs pretty well. I know nothing

New RBL idea regarding image spam

2006-10-25 Thread Bill
This may not be a new idea but wouldn't a new RBL based on image spam be worthy? I've been testing FuzzyOCR recently and although it seems to work it seems sort of brute force. From what I understand it converts the images to a PPM or PNM format and then runs gocr over those images

Re: New RBL idea regarding image spam

2006-10-25 Thread Christian Recktenwald
On Wed, Oct 25, 2006 at 10:00:10AM -0500, Bill wrote: Couldn't there be an RBL established ... that maintained the hash of known spam images and forego the wordlist detection? most image spam contains small differences (some flipped pixels, etc) so the hash function will return different

Re: New RBL idea regarding image spam

2006-10-25 Thread Bill
To: Bill ; users@spamassassin.apache.org Sent: Wednesday, October 25, 2006 10:06 AM Subject: Re: New RBL idea regarding image spam On Wed, Oct 25, 2006 at 10:00:10AM -0500, Bill wrote: Couldn't there be an RBL established ... that maintained the hash of known spam images and forego

Re: New RBL idea regarding image spam

2006-10-25 Thread Robert LeBlanc
Bill wrote: Ok, if the image spams all have a different hash wouldn't that make the Hash function built into Fuzzy OCR useless as well? I'm not sure I buy into that thinking. The hash option in my Fuzzy OCR setup runs pretty well. No, the FuzzyOCR plugin's hash system isn't a checksum of

Image Spam Detection

2006-10-10 Thread Marc Perkel
I notice that a lot of images spam has a structure where in the source the fake text is at the top and the image code is at the bottom but it is made to appear so that the image is at the top and the text is at the bottom. Seems to me that this should be something we could test for?

RE: Image Spam Detection

2006-10-10 Thread Bowie Bailey
Marc Perkel wrote: I notice that a lot of images spam has a structure where in the source the fake text is at the top and the image code is at the bottom but it is made to appear so that the image is at the top and the text is at the bottom. Seems to me that this should be something we could

Mime part boundary changingin Image Spam

2006-09-20 Thread Ben Wylie
-printable [HTML Content] --=_NextPart_001_0006_01C6DC77.1B7CF1F0-- They then revert back to the original mime boundary for the image spam mime part: --=_NextPart_000_0005_01C6DC77.1B7CF1F0 Content-Type: image/gif; name=fighting.gif Content-Transfer-Encoding: base64 Content-ID

Re: Mime part boundary changingin Image Spam

2006-09-20 Thread Theo Van Dinter
multipart/alternate. They then revert back to the original mime boundary for the image spam mime part: Yep, the image isn't an alternate for the text parts. Does this happen in legitimate emails as well? Absolutely. I have never seen this in a legit email, however i do spend far longer

Re: Mime part boundary changingin Image Spam

2006-09-20 Thread Jonas Eckerman
Ben Wylie wrote: I have noticed that a lot of spam messages change their mime boundary during the message. That's not really what happens. The example you included is of nested MIME entities: the top MIME entity is a multipart entity containg another multipart entity. Does this happen in

Re: Image spam with inline jpeg image

2006-08-11 Thread Justin Mason
jdow writes: From: Jim Maul [EMAIL PROTECTED] Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is not possible without configuring

Re: Image spam with inline jpeg image

2006-08-11 Thread Logan Shaw
On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's an undesirable behavior that, upon

RE: Image spam with inline jpeg image

2006-08-11 Thread Bret Miller
On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's an undesirable behavior that,

Re: Image spam with inline jpeg image

2006-08-11 Thread Justin Mason
Bret Miller writes: On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's an

RE: Image spam with inline jpeg image

2006-08-11 Thread Bret Miller
Bret Miller writes: On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would

Re: Image spam with inline jpeg image

2006-08-11 Thread Theo Van Dinter
On Fri, Aug 11, 2006 at 10:14:46AM -0500, Logan Shaw wrote: What happens if the new set is broken? There's no easy way to revert to the last known good state. sa-update lint checks the new files in a separate temp area before installing them into the real directory. Only if lint succeeds

RE: sa-update broken? (was Image spam with inline jpeg image)

2006-08-11 Thread Bret Miller
On Fri, Aug 11, 2006 at 10:14:46AM -0500, Logan Shaw wrote: What happens if the new set is broken? There's no easy way to revert to the last known good state. sa-update lint checks the new files in a separate temp area before installing them into the real directory. Only if lint succeeds

Re: sa-update broken? (was Image spam with inline jpeg image)

2006-08-11 Thread Theo Van Dinter
I received/responded to this privately before it was also sent to the list, so paraphrasing below... On Fri, Aug 11, 2006 at 08:45:43AM -0700, Bret Miller wrote: But adding the option to archive will make at least some people more comfortable with running sa-update. So I added the bz ticket.

Re: Image spam with inline jpeg image

2006-08-11 Thread DAve
Bret Miller wrote: Bret Miller writes: On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's

Re: Image spam with inline jpeg image

2006-08-11 Thread Theo Van Dinter
On Fri, Aug 11, 2006 at 11:56:00AM -0400, DAve wrote: I think a status report would be a good option as well. SA already asks you for your admins email address at install time. Sending a report of what happened during the sa-update process would be very, very valuable. Hrm. I'd say feel

Re: Image spam with inline jpeg image

2006-08-11 Thread DAve
Theo Van Dinter wrote: On Fri, Aug 11, 2006 at 11:56:00AM -0400, DAve wrote: I think a status report would be a good option as well. SA already asks you for your admins email address at install time. Sending a report of what happened during the sa-update process would be very, very valuable.

Re: Image spam with inline jpeg image

2006-08-11 Thread jdow
From: Logan Shaw [EMAIL PROTECTED] On Fri, 11 Aug 2006, Justin Mason wrote: jdow writes: Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's

Re: Image spam with inline jpeg image

2006-08-11 Thread jdow
From: Justin Mason [EMAIL PROTECTED] jdow writes: From: Jim Maul [EMAIL PROTECTED] Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is

RE: Image spam with inline jpeg image

2006-08-11 Thread Kenneth Porter
--On Wednesday, August 09, 2006 3:54 PM -0500 Logan Shaw [EMAIL PROTECTED] wrote: This is purely a philosophical argument, but something seems wrong about the idea of using a package manager to manage volatile data files in /var. The problem is not the use of the package manager but the

Re: Image spam with inline jpeg image

2006-08-11 Thread Kenneth Porter
--On Wednesday, August 09, 2006 7:33 PM -0700 jdow [EMAIL PROTECTED] wrote: For about a femto-second, perhaps. There is too much YMMV involved with the SARE rule sets to make it practical as an rpm solution. True, this is the real problem with packaging SARE: There's no clear separation of

Re: Image spam with inline jpeg image

2006-08-11 Thread John D. Hardin
On Fri, 11 Aug 2006, Kenneth Porter wrote: --On Wednesday, August 09, 2006 7:33 PM -0700 jdow [EMAIL PROTECTED] wrote: For about a femto-second, perhaps. There is too much YMMV involved with the SARE rule sets to make it practical as an rpm solution. True, this is the real problem

RE: Image spam with inline jpeg image

2006-08-11 Thread Bret Miller
Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's an undesirable behavior that, upon successful download of the new set of rules, it

Re: Image spam with inline jpeg image

2006-08-11 Thread jdow
From: Bret Miller [EMAIL PROTECTED] Nor does it make sense to use a tool, even if supplied with SpamAssassin, that is broken for performing updates. what's the broken part? Well, this may not qualify as broken, but I would say it's an undesirable behavior that, upon successful

RE: Image spam with inline jpeg image

2006-08-11 Thread Gary Funck
-Original Message- From: jdow [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 09, 2006 7:33 PM Gary Funck wrote: Has anyone considered also supplying new rules in the form of rpm's available via a yum-compatible repository? It'd be nice to have the usual versioning and logging

RE: Image spam with inline jpeg image

2006-08-10 Thread Benny Pedersen
On Wed, August 9, 2006 22:01, Gary Funck wrote: could be done as a gateway to sa-update, perhaps providing the updates in other package formats as well. rpm packages does not install sa-update ? i know yum, but dont make it the better sa-update :-) it was worse enogh with rulesdujour --

RE: Image spam with inline jpeg image

2006-08-10 Thread Bret Miller
On Wed, 9 Aug 2006, Gary Funck wrote: Has anyone considered also supplying new rules in the form of rpm's available via a yum-compatible repository? It'd be nice to have the usual versioning and logging support as well as a central update facility. This could be done as a gateway

RE: image spam where is plugin directory on FC3 using SA3.1.3

2006-08-10 Thread Bret Miller
i am reading the link http://www.rulesemporium.com/plugins.htm#imageinfo then the .pm file and do not have a plugins directory. where does the .pm file go? i assume the .cf goes in /etc/mail/spamassassin and i edit v310.pre then restart spamd It is probably best to put the plugin in

Re: Image spam with inline jpeg image

2006-08-10 Thread Jim Maul
Bowie Bailey wrote: Bret Miller wrote: On Wed, 9 Aug 2006, Gary Funck wrote: Has anyone considered also supplying new rules in the form of rpm's available via a yum-compatible repository? It'd be nice to have the usual versioning and logging support as well as a central update facility. This

Re: Image spam with inline jpeg image

2006-08-10 Thread Jim Maul
Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is not possible without configuring about 62 sa-update channels (one for each ruleset RDJ manages).

RE: Image spam with inline jpeg image

2006-08-10 Thread Bowie Bailey
Jim Maul wrote: Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is not possible without configuring about 62 sa-update channels (one

RE: Image spam with inline jpeg image

2006-08-10 Thread Michael Scheidell
-Original Message- From: Bowie Bailey [mailto:[EMAIL PROTECTED] Sent: Thursday, August 10, 2006 2:45 PM To: users@spamassassin.apache.org Subject: RE: Image spam with inline jpeg image Possibly. It depends on the overhead involved in setting up the channels. Plus, not all

RE: Image spam with inline jpeg image

2006-08-10 Thread Bowie Bailey
Michael Scheidell wrote: From: Bowie Bailey [mailto:[EMAIL PROTECTED] Possibly. It depends on the overhead involved in setting up the channels. Plus, not all of us want ALL 62 files! Some of the *[0-3] files say to use 70_abcd0.cf , or _1, or_2, or_3. Would need tome cf file for

Re: Image spam with inline jpeg image

2006-08-10 Thread Stuart Johnston
Bowie Bailey wrote: Michael Scheidell wrote: From: Bowie Bailey [mailto:[EMAIL PROTECTED] Possibly. It depends on the overhead involved in setting up the channels. Plus, not all of us want ALL 62 files! Some of the *[0-3] files say to use 70_abcd0.cf , or _1, or_2, or_3. Would need tome

RE: Image spam with inline jpeg image

2006-08-10 Thread Dave Koontz
Perhaps it could be as simple as only updating existing rules for your installation? In other words, you would have to download the CF file and install it first (but you would do this anyways to test!!!). Then sa-update could simply parse your rules directory and update rules found there

Re: Image spam with inline jpeg image

2006-08-10 Thread jdow
From: Jim Maul [EMAIL PROTECTED] Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is not possible without configuring about 62 sa-update channels

Re: Image spam with inline jpeg image

2006-08-10 Thread Daryl C. W. O'Shea
On 8/11/2006 12:02 AM, jdow wrote: From: Jim Maul [EMAIL PROTECTED] Bowie Bailey wrote: It doesn't really matter to me who supports which pieces as long as they all work. Someone may be able to fix sa-update so that it can take over from RDJ, but as of now, that is not possible without

Image spam with inline jpeg image

2006-08-09 Thread Ramprasad
All my rulesets and the LARGO rules are for catching inline png and inline gif. Now I am getting stock spams with images like --=_NextPart_001_000C_01C6BBE8.11C02650-- --=_NextPart_000_000B_01C6BBE8.11BB4450 Content-Type: image/jpeg; name=militarism.jpg Content-Transfer-Encoding:

Re: Image spam with inline jpeg image

2006-08-09 Thread Dhawal Doshy
Ramprasad wrote: All my rulesets and the LARGO rules are for catching inline png and inline gif. Now I am getting stock spams with images like --=_NextPart_001_000C_01C6BBE8.11C02650-- --=_NextPart_000_000B_01C6BBE8.11BB4450 Content-Type: image/jpeg; name=militarism.jpg

Re: Image spam with inline jpeg image

2006-08-09 Thread Richard
-BEGIN PGP SIGNED MESSAGE- Hash: RIPEMD160 Are you using the updated version OR the one originally posted? http://www.rulesemporium.com/plugins.htm#imageinfo can the rules_du_jour script be config'd to pickup plugin updates as well? i'd guess more than just an add to

Re: Image spam with inline jpeg image

2006-08-09 Thread Ramprasad
http://www.rulesemporium.com/plugins.htm#imageinfo Updates: - added optimization changes by Theo Van Dinter - added jpeg support - added function image_named() - added function image_size_exact() - added function image_size_range() - added function image_to_text_ratio() - dhawal

Re: Image spam with inline jpeg image

2006-08-09 Thread MennovB
image-spam that got a LARGO score since the install last week, I don't get many of those spams.. Regards Menno -- View this message in context: http://www.nabble.com/Image-spam-with-inline-jpeg-image-tf2079118.html#a5728450 Sent from the SpamAssassin - Users forum at Nabble.com.

Re: image spam detection idea

2006-08-09 Thread Todd Merritt
I had a similar, less expensive thought; Checking the global color table in the header of all of the gif images in a particular message. I tested a couple of spam cases and the GCTs are identical in all of my limited number of test cases. Logan Shaw wrote: Looks like people have started to

RE: Image spam with inline jpeg image

2006-08-09 Thread Gary Funck
first and only image-spam that got a LARGO score since the install last week, I don't get many of those spams.. The OCR plugin hits on this one: Content analysis details: (11.5 points, 5.0 required) pts rule name description

Re: Image spam with inline jpeg image

2006-08-09 Thread Benny Pedersen
On Wed, August 9, 2006 16:39, Richard wrote: can the rules_du_jour script be config'd to pickup plugin updates as well? i'd guess more than just an add to TRUSTED_RULESETS everyone likes to have sa-update ruledujour now :-) rules_du_jour was done when sa-update did not exists -- Benny

image spam where is plugin directory on FC3 using SA3.1.3

2006-08-09 Thread Obantec Support
Hi i am reading the link http://www.rulesemporium.com/plugins.htm#imageinfo then the .pm file and do not have a plugins directory. where does the .pm file go? i assume the .cf goes in /etc/mail/spamassassin and i edit v310.pre then restart spamd Mark

Re: Image spam with inline jpeg image

2006-08-09 Thread Richard
-BEGIN PGP SIGNED MESSAGE- Hash: RIPEMD160 hi, can the rules_du_jour script be config'd to pickup plugin updates as well? i'd guess more than just an add to TRUSTED_RULESETS everyone likes to have sa-update ruledujour now :-) i'm sorry, i don't understand that sentence.

Re: Image spam with inline jpeg image

2006-08-09 Thread DAve
Richard wrote: -BEGIN PGP SIGNED MESSAGE- Hash: RIPEMD160 hi, can the rules_du_jour script be config'd to pickup plugin updates as well? i'd guess more than just an add to TRUSTED_RULESETS everyone likes to have sa-update ruledujour now :-) i'm sorry, i don't understand that

Re: Image spam with inline jpeg image

2006-08-09 Thread Theo Van Dinter
On Wed, Aug 09, 2006 at 09:58:19AM -0700, Richard wrote: rules_du_jour was done when sa-update did not exists are you implying that sa-update replaces rules-du-jour? That depends on what you mean by replaces. i though sa-update updates the SA distro's bundled rules, but NOT any additional

Re: Image spam with inline jpeg image

2006-08-09 Thread Spamassassin List
- Original Message - From: Gary Funck [EMAIL PROTECTED] To: users@spamassassin.apache.org Sent: Thursday, August 10, 2006 12:04 AM Subject: RE: Image spam with inline jpeg image Menno wrote: Ramprasad wrote: But still this mail is getting thru http://ecm.netcore.co.in/tmp

RE: Image spam with inline jpeg image

2006-08-09 Thread Gary Funck
Theo wrote (in part): sa-update is a generic tool that lets users download channels (ie: bundles of rules/plugins) from anywhere that decides to publish them (requires a certain setup, etc.) At the moment, the only published channel that I know of is updates.spamassassin.org. (all

RE: Image spam with inline jpeg image

2006-08-09 Thread Logan Shaw
On Wed, 9 Aug 2006, Gary Funck wrote: Has anyone considered also supplying new rules in the form of rpm's available via a yum-compatible repository? It'd be nice to have the usual versioning and logging support as well as a central update facility. This could be done as a gateway to sa-update,

RE: Image spam with inline jpeg image

2006-08-09 Thread Bowie Bailey
Logan Shaw wrote: On Wed, 9 Aug 2006, Gary Funck wrote: Has anyone considered also supplying new rules in the form of rpm's available via a yum-compatible repository? It'd be nice to have the usual versioning and logging support as well as a central update facility. This could be done

Re: Image spam with inline jpeg image

2006-08-09 Thread jdow
From: Theo Van Dinter [EMAIL PROTECTED] There's nothing stoping the SARE folks from publishing a single or a bunch of channels and getting rid of RDJ in favor of sa-update if they wanted to... There are some benefits either way I suppose, and I'm biased towards sa-update of course. :| Um,

Re: Image spam with inline jpeg image

2006-08-09 Thread jdow
From: Gary Funck [EMAIL PROTECTED] Theo wrote (in part): sa-update is a generic tool that lets users download channels (ie: bundles of rules/plugins) from anywhere that decides to publish them (requires a certain setup, etc.) At the moment, the only published channel that I know of is

image spam detection idea

2006-08-04 Thread Logan Shaw
Looks like people have started to get a grip on the image spams that are so popular lately, but here's an additional idea I thought I'd toss out. (I'm not familiar enough with SA to easily figure out how to make a plugin.) Basically, these spams all have a bunch of images which are tiles of a

Re: My thoughts on image spam strategies

2006-08-02 Thread John Rudd
On Aug 1, 2006, at 10:30 PM, Derek Harding wrote: John Rudd wrote: Um, how exactly will they fail? How about a nice black white speckled image with red text on it? Explain to me how you think it will fail?

Re: My thoughts on image spam strategies

2006-08-02 Thread Derek Harding
John Rudd wrote: On Aug 1, 2006, at 10:30 PM, Derek Harding wrote: John Rudd wrote: Um, how exactly will they fail? How about a nice black white speckled image with red text on it? Explain to me how you think it will fail? So you're dropping three bits? White is FF, Black 00,

Re: My thoughts on image spam strategies

2006-08-02 Thread Benny Pedersen
On Wed, August 2, 2006 06:11, John Rudd wrote: white will produce (assuming 24bit color) f0,f0,f0 and black will produce 00,00,00. Thus, you get a nice high-contrast image for feeding just for clearness white is ff, ff, ff will it not be much faster just to make a md5 sum on the image file

Re: My thoughts on image spam strategies

2006-08-02 Thread John Rudd
On Aug 1, 2006, at 11:58 PM, Derek Harding wrote: John Rudd wrote: On Aug 1, 2006, at 10:30 PM, Derek Harding wrote: John Rudd wrote: Um, how exactly will they fail? How about a nice black white speckled image with red text on it? Explain to me how you think it will fail? So you're

Re: My thoughts on image spam strategies

2006-08-02 Thread John Rudd
On Aug 2, 2006, at 12:12 AM, Benny Pedersen wrote: On Wed, August 2, 2006 06:11, John Rudd wrote: white will produce (assuming 24bit color) f0,f0,f0 and black will produce 00,00,00. Thus, you get a nice high-contrast image for feeding just for clearness white is ff, ff, ff yes, white

Re: My thoughts on image spam strategies

2006-08-02 Thread Matthias Keller
will it not be much faster just to make a md5 sum on the image file without thinking if it a appel or orange ? :-) Yes, but just taking a straight sum will be sensitive to all of those small pixels which are changed by the spammers so that they have different sums, but the differences

Re: My thoughts on image spam strategies

2006-08-02 Thread John Rudd
On Aug 2, 2006, at 3:03 AM, Matthias Keller wrote: will it not be much faster just to make a md5 sum on the image file without thinking if it a appel or orange ? :-) Yes, but just taking a straight sum will be sensitive to all of those small pixels which are changed by the spammers so that

Re: My thoughts on image spam strategies

2006-08-02 Thread dirk
On Aug 2, 2006, at 3:03 AM, Matthias Keller wrote: will it not be much faster just to make a md5 sum on the image file without thinking if it a appel or orange ? :-) Yes, but just taking a straight sum will be sensitive to all of those small pixels which are changed by the spammers so that

Re: My thoughts on image spam strategies

2006-08-02 Thread John D. Hardin
On Wed, 2 Aug 2006 [EMAIL PROTECTED] wrote: Maybe I'm not getting the obvious, but what about using something like Perl::Magick to convert a given image into B/W? I mean, ImageMagick is made for things like that... Shrinking it to, say, a quarter of it's original size would take care of at

Re: My thoughts on image spam strategies

2006-08-02 Thread Derek Harding
John Rudd wrote: No, 70 would still be 70. 07 would become 00. And 07 is a pretty faint red. Looking at it now, I can't distinguish it from black. (70 is 0111 so the lower 3 or 4 bits are already 0's, whereas 07 is 0111 .. THAT becomes 0 and is indistinguishable from

My thoughts on image spam strategies

2006-08-01 Thread John Rudd
1) use Martin Blapp's OCR plugin/patch for SA. feed data to bayes. http://antispam.imp.ch/patches/patch-ocrtext 2) to combat the images with subtle differences, develop a checksum method that ignores the lower (3 or 4 bits? out of 8 bits) of each color channel. That way you get what is

Re: My thoughts on image spam strategies

2006-08-01 Thread Loren Wilton
2) to combat the images with subtle differences, develop a checksum method that ignores the lower (3 or 4 bits? out of 8 bits) of each color channel. That way you get what is essentially a very high Won't work. White on black and black on white are both quite readable, and will fail the

Re: My thoughts on image spam strategies

2006-08-01 Thread John Rudd
On Aug 1, 2006, at 8:55 PM, Loren Wilton wrote: 2) to combat the images with subtle differences, develop a checksum method that ignores the lower (3 or 4 bits? out of 8 bits) of each color channel. That way you get what is essentially a very high Won't work. White on black and black on

Re: My thoughts on image spam strategies

2006-08-01 Thread Derek Harding
John Rudd wrote: Um, how exactly will they fail? How about a nice black white speckled image with red text on it? BTW I think the OCR approach is unlikely to succeed due to processing constraints. Derek

Re: How to identify image spam finally?

2006-07-27 Thread Loren Wilton
majority of mails I receive has a big image on the top, sometimes combined from multiple image files, containing a lot of text I don't want to read (stocks info and the like), followed by some lines of Try the rulesemporium stock rules. Loren

How to identify image spam finally?

2006-07-26 Thread Yves Goergen
Hi there, I'm running SpamAssassin on my mailbox and rejecting anything above a score of 10. But lately the spam volume increases again. The bug majority of mails I receive has a big image on the top, sometimes combined from multiple image files, containing a lot of text I don't want to read

Re: Why is there so much hype behind Image spam

2006-07-26 Thread Hamish
On Sunday 16 July 2006 06:00, John Andersen wrote: On Saturday 15 July 2006 08:49 pm, jdow wrote: Somehow I figure a better than 1200:1 scoring ratio is a pretty lopsided win for SpamAssassin. And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in

Re: How to identify image spam finally?

2006-07-26 Thread jdow
Visit http://www.rulesemporium.com/ and read up on the various sets of rules these fine people maintain. Many of them do very well with image only spam or image over nonsense text spam as well as stock spam. For these types of spam it is also imperative that you have the standard set of block

RE: Why is there so much hype behind Image spam

2006-07-17 Thread Chris Santerre
Title: RE: Why is there so much hype behind Image spam -Original Message- From: Bart Schaefer [mailto:[EMAIL PROTECTED]] Sent: Sunday, July 16, 2006 11:06 PM To: users@spamassassin.apache.org Subject: Re: Why is there so much hype behind Image spam On 7/16/06, John

Re: Why is there so much hype behind Image spam

2006-07-17 Thread Shane Williams
On Sun, 16 Jul 2006, John Andersen wrote: On Sunday 16 July 2006 06:35 am, Shane Williams wrote: I never realized SpamAssassin was started back in 1994.  What version number was that?  I'd say it was definitely ahead of its time, since I almost never got email spam until around 1996-1997 The

Re: Why is there so much hype behind Image spam

2006-07-17 Thread DAve
Shane Williams wrote: On Sun, 16 Jul 2006, John Andersen wrote: On Sunday 16 July 2006 06:35 am, Shane Williams wrote: I never realized SpamAssassin was started back in 1994. What version number was that? I'd say it was definitely ahead of its time, since I almost never got email spam until

Re: Why is there so much hype behind Image spam

2006-07-17 Thread Andy Jezierski
been with that ISP since the Pleistocene I just inserted 10 years as an approximation. And since you're also confusing SA with SpamBouncer, the reasonable conclusion here is that you have no idea what you're talking about. :-D As for the image spam, like the article says: Spammers

Re: Why is there so much hype behind Image spam

2006-07-16 Thread jdow
From: John Andersen [EMAIL PROTECTED] And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in excess of 95% of all email is spam. They're trying harder. We ARE keeping it out of user's mailboxes. I consider that a win. I consider it a real win that they

Re: Why is there so much hype behind Image spam

2006-07-16 Thread Faisal N Jawdat
On Jul 16, 2006, at 1:00 AM, John Andersen wrote: And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in excess of 95% of all email is spam. I'm unconvinced of this -- my spam load has leveled off at 200 per day. On the order of 1 per week makes it

Re: Why is there so much hype behind Image spam

2006-07-16 Thread John D. Hardin
On Sat, 15 Jul 2006, John Andersen wrote: On Saturday 15 July 2006 08:49 pm, jdow wrote: Somehow I figure a better than 1200:1 scoring ratio is a pretty lopsided win for SpamAssassin. And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in excess of

Re: Why is there so much hype behind Image spam

2006-07-16 Thread John Andersen
On Sunday 16 July 2006 06:35 am, Shane Williams wrote: I never realized SpamAssassin was started back in 1994.  What version number was that?  I'd say it was definitely ahead of its time, since I almost never got email spam until around 1996-1997 The comment was off-hand and not researched.

Re: Why is there so much hype behind Image spam

2006-07-16 Thread John Andersen
On Sunday 16 July 2006 06:44 am, Faisal N Jawdat wrote: On Jul 16, 2006, at 1:00 AM, John Andersen wrote: And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in excess of 95% of all email is spam. I'm unconvinced of this -- my spam load has leveled

Re: Why is there so much hype behind Image spam

2006-07-16 Thread Daryl C. W. O'Shea
John Andersen wrote: The comment was off-hand and not researched. One of my earliest ISPs recommended Spamassassin when it was just a bunch of scripts written by some woman who's name escapes me. That must have been Justine. ;)

Re: Why is there so much hype behind Image spam

2006-07-16 Thread Bart Schaefer
On 7/16/06, John Andersen [EMAIL PROTECTED] wrote: The comment was off-hand and not researched. One of my earliest ISPs recommended Spamassassin when it was just a bunch of scripts written by some woman who's name escapes me. I suspect you're thinking of SpamBouncer. Catherine A. Hampton.

Re: Re: Why is there so much hype behind Image spam

2006-07-15 Thread Nigel Frankcom
I'd have said the tools were the spammers and the image spams their implements - but that'd just be semantics :-} On Sat, 15 Jul 2006 04:08:51 -0700, Loren Wilton [EMAIL PROTECTED] wrote: marketing.. or should I expect a huge deluge of Image spam this weekend Maybe. Who knows. Image spam has

Re: Why is there so much hype behind Image spam

2006-07-15 Thread John Andersen
Subject: Re: Why is there so much hype behind Image spam Date: Saturday 15 July 2006 08:15 pm From: John Andersen [EMAIL PROTECTED] To: spamassassin-users@incubator.apache.org On Saturday 15 July 2006 03:08 am, Loren Wilton wrote: and if spammers weren't so incompetent in general it would

Re: Why is there so much hype behind Image spam

2006-07-15 Thread jdow
From: John Andersen [EMAIL PROTECTED] On Saturday 15 July 2006 03:08 am, Loren Wilton wrote: and if spammers weren't so incompetent in general it would be even harder than it is. An odd comment, especially for a project like Spamassassin which has had to run full out for the last dozen years

Re: Why is there so much hype behind Image spam

2006-07-15 Thread John Andersen
On Saturday 15 July 2006 08:49 pm, jdow wrote: Somehow I figure a better than 1200:1 scoring ratio is a pretty lopsided win for SpamAssassin. And yet, in spite of your statistics, there is more spam than ever. Some estimates are that in excess of 95% of all email is spam. If it didn't pay, no

RE: Re[2]: checksumming image spam

2006-05-24 Thread Sietse van Zanen
[2]: checksumming image spam And to me that sounds like me running a Small Business Server I should be alrighht? Yes, absolutely. --Sandy

RE: Re[2]: checksumming image spam

2006-05-24 Thread Bowie Bailey
Paul Matthews wrote: And to me that sounds like me running a Small Business Server I should be alrighht? Yes, absolutely. --Sandy When I want to test that spam assassin it working it's fairly easy, look in the header information or user the gtude command

RE: Re[2]: checksumming image spam

2006-05-24 Thread Sietse van Zanen
Or do some tcpdumping on ports UDP 6277 (DCC) and TCP 2703 (Razor2) -Sietse From: Bowie Bailey [mailto:[EMAIL PROTECTED] Sent: Wed 24-May-06 15:24 To: users@spamassassin.apache.org Subject: RE: Re[2]: checksumming image spam Paul Matthews wrote

RE: checksumming image spam

2006-05-23 Thread Paul Matthews
Razor is also a good check, but it only free for personal use (same as dcc): http://razor.sourceforge.net Razor compile and install is a bit more difficult than dcc or pyzor, as it might need a whole lot of perl modules (depending on what is already there), so better get your CPAN right and

Re[2]: checksumming image spam

2006-05-23 Thread Sanford Whiteman
And to me that sounds like me running a Small Business Server I should be alrighht? Yes, absolutely. --Sandy

Re: Re[2]: checksumming image spam

2006-05-23 Thread Paul Matthews
And to me that sounds like me running a Small Business Server I should be alrighht? Yes, absolutely. --Sandy When I want to test that spam assassin it working it's fairly easy, look in the header information or user the gtude command http://spamassassin.apache.org/gtube/ But what

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