On 2020-07-22 12:25 a.m., Michael Richardson wrote:
If the message goes through "mailman" or some other processor, then it seems
like it ought to rip pretty much every X-FOO out. The rest of them ought to
be known headers at the time the processor was written, and it ought to
either know what they are, or it does not, in which case, it shouldn't pass
on things it does not know about.
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