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Re: Point of Order: Incomplete, flawed response to MARID WG Chart er

2004-08-19 11:08:49

"Chris" == Chris Haynes <chris(_at_)harvington(_dot_)org(_dot_)uk> writes:

    Chris> No, it does not.

    Chris> I was pointing out that: 
    Chris> 1) Sender-ID makes the backscatter problem worse,
    Chris> 2) SPF can in many cases make it better, but never worse.

Really?  draft-mengwong-spf-01 permits rejection of a message with a
550 reply code if the SPF check fails, and that's what most
implementations seem to do.

If you reject an SMTP transaction due to an SPF failure, then the
up-stream MTA is likely to generate a bounce to a forged address.

As far as I can see, all MARID schemes are likely to increase
backscatter.  In fact, anything that cause more mail to be SMTP
rejected will increase backscatter.

         -roy