Unfortunately GAPPY_TEXT has issues which give it horrible statistics, thus a low score...
From 2.43's STATISTICS.txt
OVERALL% SPAM% NONSPAM% S/O RANK SCORE NAME 1.421 2.233 1.262 0.64 0.35 0.01 GAPPY_TEXT
So while it's been identified as a problem, there's no current rule for it.
However in 2.50, bayes will eat this kind of stuff for lunch with the greatest of ease.
I'd venture to guess that v.i.a.g.r.a is not a very statistically common pattern in nonspam and one easily recognized by bayes type tokenization :)
At 07:30 PM 2/6/2003 +0000, Martin Radford wrote:
Hi all,
Well, this probably isn't a new trick, but it's the first time I've noticed it:
Here is your chance to skip the embarrassing, time-consuming task of going to d.octor's appointments to try and get the p.rescription you want. We're ready to Fedex your online v_i a g r_a p.rescription orders right now!!!
No p.rescription necessary!!! Just visit the link below and have your v_i a g r_a on its way to you today!!! http://www.TropicalPills.com/main2.php?rx=17283
Note the "d.octor's", "p.rescription", "v_i a g r_a".
Grepping 2.50 and 2.43 don't reveal checks for "doctor", "prescription", or "viagra" (in lower case), but the way the spammer has tried to obfuscate these words indicate that s/he is trying to get round simple text matching rules.
Martin -- Martin Radford | "Only wimps use tape backup: _real_ [EMAIL PROTECTED] | men just upload their important stuff -o) Registered Linux user #9257 | on ftp and let the rest of the world /\\ - see http://counter.li.org | mirror it ;)" - Linus Torvalds _\_V
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