Re: [apps-discuss] A greylisting question

John C Klensin <john-ietf@jck.com> Sat, 18 February 2012 16:42 UTC

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Date: Sat, 18 Feb 2012 11:42:40 -0500
From: John C Klensin <john-ietf@jck.com>
To: "Murray S. Kucherawy" <msk@cloudmark.com>, apps-discuss@ietf.org
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Subject: Re: [apps-discuss] A greylisting question
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--On Thursday, February 16, 2012 23:35 -0800 "Murray S.
Kucherawy" <msk@cloudmark.com> wrote:

> I suspect the IESG will ask this if we don't cover it, so
> let's put something in about this now...
> 
> The current draft only talks about IPv4, because that's what
> we have experience with so far in terms of greylisting.  How
> does our advice translate to IPv6?  Is it the same?

Murray,

If you go down the path of commenting about things with which we
have little experience, it could be interesting to explore the
implications of large-scale (not just end-network) address
translation as well, whether carried out by CGNs or other
methods.  But I think that just reinforces the view that, while
a paragraph explaining what we don't know (or don't know with
any certainty) could be useful, any attempt to identify specific
best practices will just lead into rat holes.

    john