linux-kernel - Re: Spam, bogofilter, etc

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Date:	Mon, 02 Oct 2006 22:58:32 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	"Martin J. Bligh" <mbligh@...igh.org>,
	Lee Revell <rlrevell@...-job.com>,
	Matti Aarnio <matti.aarnio@...iler.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Spam, bogofilter, etc

> 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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