A bit of spam I received today had a couple clues about how they come up
with their headers that might help you set up your spam filter.  The have a
regexp in the headers and another in the body that are normally replaced
with plain text:
Subject: Re: %RND_UC_CHAR[2-8], that same massolit
and from the body:
Free CableTV!No more pay!%RND_SYB

I think it's a safe bet that %RND_UC_CHAR[2-8] means a string of 2 to 8
([2-8]) characters comprised of random (RND) uppercase (UC) characters
(CHAR).  I'm not as sure about %RND_SYB, but I'm guessing that it means a
single random symbol.

-- Rich



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