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.
It's exactly forcing all the mail through the submission host so it can do
outbound filtering. That's been common on consumer mail systems for
decades.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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