Messages in this thread | | | Subject | Re: Spam, bogofilter, etc | From | Alan Cox <> | Date | Mon, 02 Oct 2006 22:58:32 +0100 |
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> Of course, the MX checking can also be avoided, and a lot of spam-bots > know to use the ISP connection instead of a direct port-25 approach. But > at least that way, the mail gateway can (and often does) notice the > flooding, and many ISP's successfully throttle at least some spam at the > source, so it does actually have real meaning.
Actually some of the smarter big ISPs with the less technical customers transproxy port 25 anyway - using big Linux boxes and the netfilter code.
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