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span and filters



 
 
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  #1  
Old February 14th 08, 11:08 AM posted to microsoft.public.outlook
CGR
external usenet poster
 
Posts: 4
Default span and filters

Hi,

I have a lot of junk mail coming in and my filters take care of most of it.
The problem I have is with people using the span function to disguise junk
for instance:

VIAspan fontcolor="#black"GRA/span

I had hoped that an outlook rule would recognise span and send it to my
junk e-mail box but it doesn't.

Any advise would be greatly appreciated.
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  #2  
Old February 14th 08, 12:20 PM posted to microsoft.public.outlook
VanguardLH[_2_]
external usenet poster
 
Posts: 1,313
Default span and filters

"CGR" wrote in message
...

I have a lot of junk mail coming in and my filters take care of most
of it.
The problem I have is with people using the span function to
disguise junk
for instance:

VIAspan fontcolor="#black"GRA/span

I had hoped that an outlook rule would recognise span and send it
to my
junk e-mail box but it doesn't.


And they can split it across cells in a table, misspell the words or
add interceding characters, and other schemes to hide their spammy
keywords. It is an attempt to hide from Bayesian or spam-word
filters. That's not the only way to detect spam. Look at SpamPal.
It's free. Besides Bayesian, it detects known spam sources using
DNSBLs (IP blacklists), P2P (or DCC where users reports the hash value
for an e-mail using some fuzzy logic to see how many users received
the same e-mail), HTML checking, and other methods. Forget trying to
make rules that emulate a spam-word filter. Spam-word filters never
work very well and generate lots of false positives.

  #3  
Old February 14th 08, 02:22 PM posted to microsoft.public.outlook
Brian Tillman
external usenet poster
 
Posts: 17,452
Default span and filters

CGR wrote:

I have a lot of junk mail coming in and my filters take care of most
of it. The problem I have is with people using the span function to
disguise junk for instance:

VIAspan fontcolor="#black"GRA/span

I had hoped that an outlook rule would recognise span and send it to
my junk e-mail box but it doesn't.


Outlook rules cannot detect the HTML commands.
--
Brian Tillman [MVP-Outlook]
  #4  
Old February 14th 08, 03:34 PM posted to microsoft.public.outlook
CGR
external usenet poster
 
Posts: 4
Default span and filters

"Brian Tillman" wrote:

Outlook rules cannot detect the HTML commands.


This is what confuses me, if it can't detect them a filter for span should
work, obviously it does detect them as it is ignoring my filter, this being
the case you should be able to do something.

I am trying to avoid looking at all this rubbish and I think that there is
nothing worthwhile likely to be sent to me that contains a span function,
if there is I could find it later in the junk folder.
  #5  
Old February 14th 08, 03:45 PM posted to microsoft.public.outlook
Diane Poremsky [MVP]
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Posts: 12,991
Default span and filters

legit html email does use span tags.

What version of outlook? (Since you didn't include the previous content on
your reply I have no idea if you mentioned the version before.)

--
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"CGR" wrote in message
...
"Brian Tillman" wrote:

Outlook rules cannot detect the HTML commands.


This is what confuses me, if it can't detect them a filter for span
should
work, obviously it does detect them as it is ignoring my filter, this
being
the case you should be able to do something.

I am trying to avoid looking at all this rubbish and I think that there is
nothing worthwhile likely to be sent to me that contains a span
function,
if there is I could find it later in the junk folder.


  #6  
Old February 14th 08, 04:27 PM posted to microsoft.public.outlook
CGR
external usenet poster
 
Posts: 4
Default span and filters

Outlook 2003 SP3

I know legit stuff can use the span tag but I have no urgent need to see
anything with it in and can find it in the junk folder later.

"Diane Poremsky [MVP]" wrote:

legit html email does use span tags.

What version of outlook? (Since you didn't include the previous content on
your reply I have no idea if you mentioned the version before.)


  #7  
Old February 14th 08, 08:44 PM posted to microsoft.public.outlook
Brian Tillman
external usenet poster
 
Posts: 17,452
Default span and filters

CGR wrote:

This is what confuses me, if it can't detect them a filter for span
should work, obviously it does detect them as it is ignoring my
filter, this being the case you should be able to do something.


No, if it can't detect them, a filter for them WON'T work. As far as
Outlook is concerned, the raw HTML doesn't exist in the message. A rule
cannot detect the HTML tags.
--
Brian Tillman [MVP-Outlook]

  #8  
Old February 15th 08, 09:29 AM posted to microsoft.public.outlook
VanguardLH[_2_]
external usenet poster
 
Posts: 1,313
Default span and filters

"Brian Tillman" wrote in message
...
CGR wrote:

This is what confuses me, if it can't detect them a filter for
span
should work, obviously it does detect them as it is ignoring my
filter, this being the case you should be able to do something.


No, if it can't detect them, a filter for them WON'T work. As far
as Outlook is concerned, the raw HTML doesn't exist in the message.
A rule cannot detect the HTML tags.
--
Brian Tillman [MVP-Outlook]



And they don't even have to be valid HTML tags. Outlook rules cannot
determine that "PE...span...NIS.../span is valid HTML whereas
"PExtagspacerNbobsyouruncleIS" is not valid HTML. Outlook doesn't
bother interpreting the HTML code whether it is valid or not. It is
an old trick by spammers to get around filter to hide their text by by
using HTML tags, valid or not. You are trying to use a simple
spam-word filter. They don't work without incurring lots of false
positives.

 




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