Would it be possible to prefix the Subject with something like
[TechEmbedBSD] so the the Subject line reads as follows?
Yes, of course that's possible. (How much work would it be? I don't
know; I don't know anything significant about the NetBSD lists. Quite
possibly, more work than the listadmin(s) want(s) to put in.)
Such configuration makes verification of DKIM signature (and
DomainKey Signature) fail. So, anti-spam measures which use DKIM
signature won't work with it.
Only if the DKIM signature covers the Subject:. While I'm not all that
familiar with DKIM, I think it has fairly fine-grained control of what
it signs over.
But the same information is trivially - and more accurately - available
in the envelope-from. (Yes, there doubtless is filtering software in
existence that can filter on Subject: but not envelope-from. This is a
reason to get better filtering software, not a reason to damage the
list for everyone just to deal with one subscriber's choice of
inadequate filtering software.)
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