spf-discuss
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Re: OT: Change of address

2004-07-08 07:24:25
On Thu, Jul 08, 2004 at 09:15:12AM -0500, Seth Goodman wrote:
From: spf(_at_)metro(_dot_)cx
Sent: Thursday, July 08, 2004 8:55 AM
Never mind the dozens of false positives, just be happy with the
95% decrease.

Or was that 'dynamic ip (dsl and cable)' and not '(dynamic ip
dls) and cable'?

Sloppy wording on my part, so thanks for bringing it up.  You had it right:
dynamic IP DSL and dynamic IP cable (not too common, these days).  I believe
that some "dial-up" lists also include static IP cable netblocks where the
provider has stated that customers in these netblocks are not permitted to
run a mailer (at least they used to include those).  If you do this with
reasonable care, you will rarely get a false positive.  When you
occasionally do, it will generate a DSN, not get silently dropped as with a
content filter.  No disappearing email and no dozens of false positives.  If
some of your correspondents insist on running rogue mailers, whitelist them
and/or ask them to get a legitimate setup.

I agree with that policy, but what lists are you using? My main worry is that
there are maybe list maintainers that go around and see 'oh that looks like a 
netblock used for dynamic dsl', without having hard data to back up this claim.

Koen

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K.F.J. Martens, Sonologic, http://www.sonologic.nl/
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