Re: Spam, bogofilter, etc

[Alan Cox]

> 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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