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Re: Last Call: draft-klensin-rfc2821bis

John C Klensin <john-ietf@jck.com> Fri, 28 March 2008 15:10 UTC

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Date: Fri, 28 Mar 2008 11:10:25 -0400
From: John C Klensin <john-ietf@jck.com>
To: Tony Finch <dot@dotat.at>
Subject: Re: Last Call: draft-klensin-rfc2821bis
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--On Wednesday, 26 March, 2008 17:09 +0000 Tony Finch
<dot@dotat.at> wrote:

>> With that change to "address record", if no MX record is
>> found, the SMTP client is required to look for DNS names with
>> either A or AAAA RRs, rather than A RRs only.
> 
> There's also RFC 3974 (Jan 2005, informational) which
> recommends treating AAAA like A. The most popular MTAs
> implement this logic.

Yep.  But the people who are already convinced that treating
AAAA like A is the Right Thing are, well, already convinced.
And those who aren't will probably just say "well, 3974 is
informational".

Please see comments (yours, mine, and others) on the ietf-smtp
list.

    john



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