Re: Update of RFC 2606 based on the recent ICANN changes ?

John Levine <> Tue, 08 July 2008 19:12 UTC

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Date: Tue, 8 Jul 2008 15:12:23 -0400 (EDT)
From: John Levine <>
To: Tony Finch <>
Subject: Re: Update of RFC 2606 based on the recent ICANN changes ?
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> So the question of whether TLD MXs work depends on the interactions
> between lot of complicated option settings and software versions, and is
> likely in practice to work or fail unpredictably.

That sounds utterly reasonable.

To me the bigger question is whether this failure scenario is something 
the IETF needs to address, or is it is sufficiently localized that it's 
something that just another thing a domain owner should deal with.

Personally, I don't think that foo@ai -> is a major issue, 
because in recent years mail addressing has gotten rather flat, most DNS 
resolvers are configured via DHCP, and I don't get the impression that 
they have any search lists at all.  Search lists were useful 15 or 20 
years ago, but not now.  It would be interesting to hear from people 
running mail systems who were NOT running them ten years ago, to avoid the 
selection bias of people whose configuration preferences were set on the 
T1 backbone.

John Levine,, Primary Perpetrator of "The Internet for Dummies",
Information Superhighwayman wanna-be,, ex-Mayor
"More Wiener schnitzel, please", said Tom, revealingly.
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