Re: [ietf-smtp] Endless debate on IP literals
Keith Moore <moore@network-heretics.com> Fri, 03 January 2020 06:09 UTC
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From: Keith Moore <moore@network-heretics.com>
In-Reply-To: <01RFPMURANBO000059@mauve.mrochek.com>
Date: Fri, 03 Jan 2020 01:09:44 -0500
Cc: John Levine <johnl@taugh.com>, ietf-smtp@ietf.org
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References: <01RFPMURANBO000059@mauve.mrochek.com>
To: Ned Freed <ned.freed@mrochek.com>
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Subject: Re: [ietf-smtp] Endless debate on IP literals
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> On Jan 3, 2020, at 12:43 AM, Ned Freed <ned.freed@mrochek.com> wrote: > >> If you can be sure that your >> network doesn't do that, at least for its internal traffic, port 25 >> submission works fine. > > And others have stringent security policies against mail being sent to any port > other than 25. Well, we could recommend against such policies, and also recommend that devices use a different default port for submission. But it’s probably the case that some sites will still find it easier to override the default and use port 25 than to get silly security policies changed. And I expect what that means is that a mail relayer can’t tell by the port used whether to act as an MSA or an MTA. So sites might need to provision and configure separate services on different IP addresses. That’s easier than it used to be with virtual machines being common now, but could still run afoul of IT in many organizations. Anyway I guess we just make the best recommendations we can with the knowledge that there will be deviations that equipment and software must be configurable to deal with. Perhaps things will converge over time. > Getting hung up on which port does what isn't helpful. The goal should be > to figure out the actual characteristics of the services that are needed. Yeah it doesn’t matter which port but I do think it would help to further encourage a separation of function between submission and relaying. Keith
- [ietf-smtp] Possible cont4ibution to moving forwa… John C Klensin
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… John C Klensin
- Re: [ietf-smtp] Possible cont4ibution to moving f… John C Klensin
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible cont4ibution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… John C Klensin
- Re: [ietf-smtp] Possible cont4ibution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible cont4ibution to moving f… Jeremy Harris
- Re: [ietf-smtp] Possible cont4ibution to moving f… Alessandro Vesely
- Re: [ietf-smtp] Possible contiibution to moving f… John C Klensin
- Re: [ietf-smtp] Possible contiibution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible contiibution to moving f… John C Klensin
- Re: [ietf-smtp] Possible contribution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible contribution to moving f… John C Klensin
- Re: [ietf-smtp] Possible contribution to moving f… S Moonesamy
- Re: [ietf-smtp] Possible cont4ibution to moving f… Barry Leiba
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… John Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… John Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… John R Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Laura Atkins
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Laura Atkins
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Laura Atkins
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Hector Santos
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- [ietf-smtp] It's not about IP-Literals, its about… Hector Santos
- Re: [ietf-smtp] Endless debate on IP literals John C Klensin
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Jeremy Harris
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… John Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] SMTP client certs John Levine
- Re: [ietf-smtp] Endless debate on IP literals John Levine
- Re: [ietf-smtp] Possible contribution to moving f… Richard Clayton
- Re: [ietf-smtp] Possible contribution to moving f… John Levine
- Re: [ietf-smtp] Possible contribution to moving f… Viktor Dukhovni
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Endless debate on IP literals Viktor Dukhovni
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John Levine
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John Levine
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals Viktor Dukhovni
- Re: [ietf-smtp] Endless debate on IP literals Alessandro Vesely
- Re: [ietf-smtp] Possible contribution to moving f… Hector Santos
- Re: [ietf-smtp] Possible contribution to moving f… Hector Santos
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Hector Santos
- Re: [ietf-smtp] Endless debate on IP literals Hector Santos
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Hector Santos
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Possible contribution to moving f… John C Klensin
- Re: [ietf-smtp] Possible contribution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Arnt Gulbrandsen
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Possible contribution to moving f… John C Klensin
- Re: [ietf-smtp] Possible contribution to moving f… Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… John Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… John Levine
- Re: [ietf-smtp] Possible contribution to moving f… Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Ned Freed
- Re: [ietf-smtp] Possible cont4ibution to moving f… Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Ned Freed
- Re: [ietf-smtp] Endless debate on IP literals Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- [ietf-smtp] lounging around Dave Crocker
- Re: [ietf-smtp] Endless debate on IP literals Keith Moore
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] Endless debate on IP literals John R Levine
- Re: [ietf-smtp] Possible cont4ibution to moving f… Keith Moore
- Re: [ietf-smtp] lounging around John Levine
- Re: [ietf-smtp] Endless debate on submission auth… John Levine
- Re: [ietf-smtp] lounging around John Levine
- Re: [ietf-smtp] lounging around Keith Moore
- Re: [ietf-smtp] lounging around Dave Crocker