Why doesn't DCC help against image spam?

Scott Silva ssilva at sgvwater.com
Tue Dec 26 19:40:08 CET 2006

Scott Silva spake the following on 12/26/2006 10:27 AM:
> Ken A spake the following on 12/26/2006 9:50 AM:
>> Scott Silva wrote:
>>> Glenn Steen spake the following on 12/26/2006 8:58 AM:
>>>> On 26/12/06, Scott Silva <ssilva at sgvwater.com> wrote:
>>>>> Remco Barendse spake the following on 12/24/2006 7:43 AM:
>>>>>> Now that ORDB is down my mailscanner is not filtering any spam
>>>>>> anymore,
>>>>>> i might as well disable it.
>>>>>> But out of curiosity, why doesn't DCC work for the image spam?
>>>>>> A checksum should be reasonably effective against the image spam i
>>>>>> think? Assuming that they are not dynamically building each picture a
>>>>>> bit differently for each e-mail that is sent?
>>>>> But that could be what they are doing. Spammers are like cockroaches.
>>>>> They
>>>>> adapt very quickly, and after they mass-fire their crap, they change
>>>>> up a bit,
>>>>> and reload for the next salvo.
>>>>> It's war, and we are always on the defense.
>>>> Depressing but true... I think I'll have another Julsnaps... To
>>>> enliven my defenses... (If the snaps fails to do that.... well, at
>>>> least I'll be having more fun...:-)
>>>> Seriously though, I think the only real effective defenses (on my
>>>> sysytems at least) against image-based spam has been a combination of
>>>> the digests (yes, they do take _some_ of it), RFC "strictness" checks
>>>> (in PF) and ImageInfo (and some TVD rules picked up by an sa-update).
>>>> When these fail I'll be going for FuzzyOcr (have just tested this so
>>>> far, but ... it really needs muscle that the production boxes lack).
>>>> Or someone really clever will have found another method:-).
>>>> Ceers
>>> Since I have to work, have a Julsnaps for me!
>> "What's in a Julsnaps?", said the curious fellow in California?
>> I can't have one unless I know how to make it!
>> :-)
>> Ken A
>> Pacific.Net
> Glenn could answer this better, but it is an herbal liquor found in the Nordic
> regions of europe. It is usually served as close to frozen as you can get any
> form of alcohol. It has a distinct kind of nutty-fruity taste, and seems to
> have a fairly high alcohol content. I haven't had it for more than 20 years,
> but I still remember it. And I have not had anything like it since.
> So since you can't "make" it, you might be able to find some in a place like
> Bevmo in California. Some variations are called akvavit, but if I remember
> correctly, Julesnaps is a variety served around the christmas holidays.
Sorry -- meant to send that off-list.


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