No, you have completely missed the point. If the author has some
special requirements of his own, he will include his own MFT
(whatever) header, and the list owner will do nothing further. We were
discussing the case where the author (through ignorance or laziness)
did nothing and left it to the list owner to supply a sensible
default, consistent with the culture of the list.
or maybe the author did not add MFT because he wanted the default
behavior.
or maybe the author did not add MFT because he had a legacy MUA that
didn't support it.
or maybe the author did not add MFT because he wanted uniform behavior
from legacy and current recipients' MUAs.
or maybe the author did not add MFT because he didn't want to endorse
poorly-designed extensions to the mail protocol.
Keith