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Re: yet more DMARC stuff, was Re: Mailing list membership.

Carsten Bormann <cabo@tzi.org> Mon, 13 March 2017 17:28 UTC

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Subject: Re: yet more DMARC stuff, was Re: Mailing list membership.
From: Carsten Bormann <cabo@tzi.org>
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Date: Mon, 13 Mar 2017 18:28:09 +0100
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Hi Dave,

I sure understand the problem that the scarcity-based address reputation hack won’t work that well on IPv6.  But the “solution”…  And NIST isn’t exactly Mom and Pop’s Bait and Internet Shop.

On 13 Mar 2017, at 18:21, Dave Crocker <dhc@dcrocker.net> wrote:
> 
> In one of the anti-abuse organizations, I've tried to point out the problems with imposing policy changes based on transport -- independent of whether the policy change is a good idea -- but to no avail.

Well, to add insult to injury, this was a DEFER code, so our mail server tried for five days to deliver this; of course using IPv6 all the time.

No idea whether there is code around that can react to a DEFER with a change of source address.

Grüße, Carsten

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