On Monday, Mar 31, 2003, at 22:41 US/Eastern, Art Pollard wrote:
Anyway, what they do is misspell words. They use < and > to make
"se><"
for example, 1's for l's 0's (zeros) for o's, etc. It is of course
harder to read but the message is still quite understandable. What is
more, it makes it virtually impossible for a filtering mechanism to
catch it unless the various tricks such as this were programmed into
it directly.
On the contrary, Bayesian spam filtering will learn that in no time.
It'll notice that 100% of messages that contain "se><" or "v1agra" are
spam. It's actually far easier to filter for that; as someone's pointed
out already, use of attempts to get around spam filtering is a very
good indicator of spamminess.
mathew
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