spf-discuss
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RE: Re: "extreme SPF" scenario for ISPs

2004-02-03 14:27:06
On Tue, 3 Feb 2004, Seth Goodman wrote:

This is just anecdotal, but perhaps 75% of my spam (until recently I was
getting around 120 spam/day) came from hijacked machines on broadband
connections.  Very few virii came through, mostly just spam.  FWIW, Comcast
customers seemed to be the most frequent sources.  If Comcast had forced
these dynamic IP customers to use their smarthost and implemented rate
limiting, most of this spam never would have reached the outside world.

Ironically, Comcast *already* blocks port 25, but only incoming.  They
don't want their customers running their own mail servers.

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