On Sun, Aug 22, 2021 at 06:35:46AM -0700, Kevin J. McCarthy wrote:
I agree the server wasn't behaving nicely. It simply omitted some of
the headers. (Probably they were deleted at some point between the
"assembly" of the mailbox on its side and sending all the headers - the
mailbox was very large and changing constantly I think.) However the
MSNs didn't repeat or exceed the initial max MSN reported, so I think
it might be debatable if it was broken.
unless the problem was misdiagnosed due to mutt's tracking of
unsolicited EXPUNGE and EXISTS responses being actually broken, that
server would be most definitely broken. there is absolutely no wiggle
room here.