I'm not sure that I agree with this test. I use Earthlink DSL at home, and I never
send out emails using my "@earthlink.net" address. I always use my personal or
business address, neither of which are provided by Earthlink.
I'd bet that a large percentage of DSL, Cable and Dial-up customers do not use the
email account that their ISP provides, but they use their ISP's outgoing mail server
because they are forced to due to port 25 filtering.
Bill
-----Original Message-----
From: "R. Scott Perry"
Sent: Sun, 08 Jun 2003 09:36:56 -0400
Subject: Re: [Declude.JunkMail] SpamIPs Test Idea
>Another idea for a new test, a close cousin to the SpamDomains test:
>
> >Received: from styggen.com [24.208.153.243] by mx2.spamsoap.com
> >(SMTPD32-7.15) id A288E80090; Fri, 06 Jun 2003 10:42:32 -0700
>
>This message came from a road runner IP. How about a test where we build
>a list of CIDRs for a given ISP, then match it with all the domains those
>IPs use. In this case, the file entry would be (I know rr doesn't use .net)
>
>24.208.0.0/14 rr.com rr.net
>
>In this case, it would match the IP, look for both RR entries, find
>styggen.com and fail the message.
That's a pretty neat idea. That would work well for ISPs that don't allow
their customers to run a mailserver, as it would provide an easy way to
catch (most) mail from spammers on their networks, while allowing the
legitimate E-mail through.
-Scott
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