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Re: [ietf-smtp] Characteristics of Isolated (or mostly-isolated) industrial IP Networks

2020-01-04 23:58:44
On 1/4/2020 8:03 PM, Keith Moore wrote:
I suspect ietf-smtp would do better to define the behavior of a submission service that is designed to accept inbound email from devices in such an environment

The clients in such an environment appear to simply be MUAs. The submission server appears simply to be an MSA.

I gather what makes them distinctive is methods of identification and authentication -- notably reliance on network address rather than domain names -- rather than anything involving email semantics or basic protocol details (beyond ID & Auth)?

What else is distinctive?

and forward such email to a "smarthost"

What are the differences from a classic originating MTA?

From your note, the reliance on IP Address and boundary security rather than encryption appear to be the primary points of distinction.

In any event, I suspect it would be helpful to create an Informational RFC that discusses design, administration and operations issues that are noteworthy in common IoT environments. Sounds like it doesn't need to be lengthy of complicated, but formulating a discrete set of statements and getting community consensus on it could facilitate detailed wg decision-making, here and elsewhere.

Dave Crocker
Brandenburg InternetWorking

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