Re: [ietf-smtp] EHLO domain validation requirement in RFC 5321
Keith Moore <moore@network-heretics.com> Mon, 28 September 2020 22:27 UTC
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To: John Levine <johnl@taugh.com>, ietf-smtp@ietf.org
References: <20200928221602.046CE22A35B3@ary.qy>
From: Keith Moore <moore@network-heretics.com>
Message-ID: <9d36f20f-3652-6b4e-b7a6-4a4b7d6fcd66@network-heretics.com>
Date: Mon, 28 Sep 2020 18:26:57 -0400
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Subject: Re: [ietf-smtp] EHLO domain validation requirement in RFC 5321
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On 9/28/20 6:16 PM, John Levine wrote: > You appear to be saying there will be mail systems that need to send > mail to IPv4 systems, but will not have an IPv4 mail server so the > recipients can't reply to them. Really? No, I'm saying that when IPv4 starts going away, there will be more and more systems needing to send mail via NAT to such that client and server ends of the connection have different address types. (There are already some IPv6 only ISPs and I expect this will become more viable over time. Should they have to set up IPv4 tunnels or ALGs for their "legitimate" customers so those customers can still send email to IPv4 servers?) Keith
- [ietf-smtp] EHLO domain validation requirement in… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… John C Klensin
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Russ Allbery
- Re: [ietf-smtp] EHLO domain validation requiremen… John C Klensin
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Ned Freed
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Claus Assmann
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Richard Clayton
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Laura Atkins
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Laura Atkins
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Laura Atkins
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Laura Atkins
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Arnt Gulbrandsen
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Mark Andrews
- Re: [ietf-smtp] EHLO domain validation requiremen… Mark Andrews
- Re: [ietf-smtp] EHLO domain validation requiremen… John R Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Richard Clayton
- Re: [ietf-smtp] EHLO domain validation requiremen… Arnt Gulbrandsen
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Dave Crocker
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Richard Clayton
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… John Levine
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Sam Varshavchik
- Re: [ietf-smtp] EHLO domain validation requiremen… Keith Moore
- Re: [ietf-smtp] EHLO domain validation requiremen… Alessandro Vesely
- Re: [ietf-smtp] own mail server: DNS / static IP … Claus Assmann
- Re: [ietf-smtp] own mail server: DNS / static IP … John Levine
- Re: [ietf-smtp] own mail server: DNS / static IP … Claus Assmann
- Re: [ietf-smtp] own mail server: DNS / static IP … Ned Freed
- Re: [ietf-smtp] own mail server: DNS / static IP … Sam Varshavchik
- Re: [ietf-smtp] own mail server: DNS / static IP … Claus Assmann
- Re: [ietf-smtp] own mail server: DNS / static IP … Arnt Gulbrandsen
- Re: [ietf-smtp] own mail server: DNS / static IP … John Levine
- Re: [ietf-smtp] own mail server: DNS / static IP … John Levine
- Re: [ietf-smtp] own mail server: DNS / static IP … Ned Freed
- Re: [ietf-smtp] own mail server: DNS / static IP … John R Levine
- Re: [ietf-smtp] own mail server: DNS / static IP … Ned Freed
- Re: [ietf-smtp] own mail server: DNS / static IP … Dave Crocker
- Re: [ietf-smtp] own mail server: DNS / static IP … John R Levine
- Re: [ietf-smtp] own mail server: DNS / static IP … Evert Mouw
- Re: [ietf-smtp] own mail server: DNS / static IP … Sam Varshavchik
- Re: [ietf-smtp] own mail server: DNS / static IP … Claus Assmann
- Re: [ietf-smtp] own mail server: DNS / static IP … Laura Atkins
- Re: [ietf-smtp] own mail server: DNS / static IP … Sam Varshavchik