> A possibly better method is to block SMTP outbound from the ISP.

That's what we do here at the University of Richmond. Our firewall is
configued to block all outbound SMTP connections (except those of our
legitimate SMTP servers). This dramatically reduced the flow of spam
from our campus. We can now use tools to track (and block) spammers
since we only have to watch one or two servers (SpamShield works
nicely!)

Steve

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