Re: [ietf-smtp] Endless debate on IP literals

[Alessandro Vesely <[e-mail]>]

On Wed 01/Jan/2020 02:37:00 +0100 Keith Moore wrote:
> 
> I am starting to think that it's important to distinguish between
> 
> (a) SMTP the protocol, and
> 
> (b) The "globally-relevant Internet public email" service (GRIPE?  [*]) [...]


Yes


> (I have some other questions regarding IoT use of mail submission services,
> e.g. whether RFC8314 is suitable as-is for use on isolated IP networks, or
> whether IoT devices should be required to use port 587 when submitting mail so
> that the servers will know they have to treat such traffic differently than
> message relaying.    So there might need to be a separate profile for mail
> submission on networks that don't have DNS or connectivity to the public IP
> network.)


Rfc6409 is clear when it says that a server MAY implement submission on port
25.  That entails that it can tell submitting clients from relaying ones.

I found no counter indication about MSA-proxies which submit to another MSA.


> [*] Not a serious proposal for a name; I just wanted a shorthand notation for
> it and that's what I came up with in a couple of minutes.   Suggestions welcome.


s/SMTP/submission (possibly on port 25)/

s/GRIPE/SMTP/


Best
Ale
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