Killing that spam with Postgrey snd Postfix
Ever heard of greylisting?
There are numerous ways to prevent spam from reaching your inbox, the most popular is probably SpamAssassin. Greylisting will not replace spam filtering software like SA but it will serve as a powerful first hurdle for spam thus reducing the ammount of spam entering the system at all. It should rather be seen as an addition to all the other anti spam features of Postfix.
At Howto Forge.
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