We've been having trouble with spam slipping through.  They're typically
from hotmail (and hotmail servers), but not always.

These are non-bayesian sounding emails EXCEPT for a long string of spam
words, without spaces, that have double letters in them/mispellings.
They're obviously crafted to slip through filters.


Examples include:

Subject:
NoNeedToWait,DonlwoadYoourOrignaialWidnows7CcopyAndSaveMoney.GraettRanggeOffWorld-LeadaingSofwatreA
Body:

CheeapLatetstSoftwtareeAvaillableForIntsantDonwoladAfterPurchase
http://www.monikamatti.com/
In front of herself and grandmother, walked Mr. Livingstone, moody,
the sandy soil all around him gleamed in the dew. He shrugged his
considerable duration, during which he struggled to be calm, and I



Subject:
SaveBigMoneyOnLeaidingBbarndSsofftwaare.AAllPopuaalrrSsoftwwareIteemmss
Body:

GreattestSotfwareDdeealsAvailable,TrutsedAndVefriiedOnilneStore
http://www.ardelislucy.com/
the world and bewildered upon the path of life. Let us see if
VI. Greg Prepares for Flirtation Walk
pulling rapidly out of the bay, each with its own particular flag




I'm looking for suggestions on how to block these.  I've though of
1) Somehow splitting the string, but even with that, the mispellings might
slip through (though I guess the server will learn them too)
2) Somehow negatively scoring subjects with single words longer than 30
characters - but I'm afriad of blocking legit mails, say with a URL in the
subject, which my silly users and their contacts do sometimes
3) Somehow negatively scoring a mail with more than 30 characters in a
non-url string that's followed by a url on a following line.


Thanks for any insight.
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