8 lines
424 B
Text
8 lines
424 B
Text
Grey listing is a wonderful spam filtering technique, which uses a
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behavior trick: spammers never resend a message when they get a
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temporary error, whereas real MTA do. The idea is to refuse any mail
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on first attempt, and accept it after some time has elapsed.
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milter-greylist is a stand-alone milter writtenin C that implement
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grey listing. It's still quite experimental, but it has been seen
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working on a real life MX.
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