From: "Alan DeKok" <aland(_at_)freeradius(_dot_)org>
Automatic filters only work if you're not receiving any significant
amount of spam.
If you're receiving 100K+ spams a day, then the machines to run the
filters cost a fair amount of money. Not everyone can afford to spend
$10K on a mailer instead of $2K, just to get legitimate mail through.
No, the DCC is not the only automated filter that handles a lot
more than 100K spam/day generally on commodity hardware (PCs).
With the spam volume Chris Lewis is saying Nortel gets, I'd be
surprised if their infrastructure costs were less than $100K.
Large companies can afford that. Small ones can't.
No, filtering is cheap even if you use Perl schemes
such as SPamAssassin and it's almost invisible with others.
Vernon Schryver vjs(_at_)rhyolite(_dot_)com
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