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A comment on Port 25 will be blocked for South Korea from December. Parent comment

Re:Port 25 will be blocked for South Korea from December by simonbrown on Tuesday November 08, 2011 @09:01AM (#3210717)
If it was perfect, spammers would no longer have an incentive.
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Re:Port 25 will be blocked for South Korea from December by mike-cardwell on Tuesday November 08, 2011 @09:06AM (#3210732)
I already specified that perfection is impossible. Even if every email is routed via a human filter instead of a computer filter, there would still be mistakes.

If a spammer can't get a message through, they will keep tweaking it until they succeed.

If even 999 out of 1000 spams are blocked, they'll still keep firing.

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