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

2020-01-06 08:28:27
On 1/5/2020 9:19 AM, John Levine wrote:
In article <3c50a793-dd26-3254-f9e3-b642793918b7(_at_)dcrocker(_dot_)net> you 
write:
What else is distinctive?
....
If it sent mail to any other address, or if the message rate was much above
one a minute, we'd know something was screwed up with its mail.


This sounds like a variant of blocking outbound port 25.


d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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