Re: [ietf-smtp] G.7.3 --- resolvable FQDNs

John Levine <johnl@taugh.com> Sat, 08 August 2020 02:08 UTC

Date: Fri, 07 Aug 2020 22:08:43 -0400
Message-Id: <20200808020843.9FB881E604C5@ary.qy>
From: John Levine <johnl@taugh.com>
To: ietf-smtp@ietf.org
Cc: mcr+ietf@sandelman.ca
In-Reply-To: <22051.1596843872@localhost>
Organization: Taughannock Networks
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf-smtp/tNWsTKNfElO4DOAXG78O9AXOdwE>
Subject: Re: [ietf-smtp] G.7.3 --- resolvable FQDNs
Precedence: list

In article <22051.1596843872@localhost> you write:
>The explicit discussion was that in some non-Internet contexts, the domain
>name is not from the DNS.

I don't understand what that has to do with writing specs that
interoperate on the Internet. If a host is sending mail on the
Internet, it looks names up in the DNS.

Most mail servers have a hack that lets you put in routes manually to
locally override the DNS results, but I've never heard anyone say the
details of that should be standardized. Certainly in the MTAs I've
used, the way you do so has varied all over the place.

R's,
John

[ietf-smtp] G.7.3 --- resolvable FQDNs Michael Richardson
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Dave Crocker
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Michael Richardson
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Dave Crocker
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs John Levine
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Michael Peddemors
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Claus Assmann
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Michael Peddemors
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs John C Klensin
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs Sam Varshavchik
Re: [ietf-smtp] G.7.3 --- resolvable FQDNs John Levine