I guess the list should be rejecting his email! Then, perhaps, his
organisation would get around to deploying a non-discardable domain.
I've suggested it. They know they have a problem, but they won't yet say
what they're going to do about it.
As you may recall, they suggested that lists sign an A-R header and all
recipient systems track what lists they're subscribed to and do
complicated processing to see whether list mail was signed when it showed
up at the list. Oddly, that didn't get much traction.
R's,
John
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