In https://wiki.dovecot.org/Migration/Courier ,
mail_location = maildir:~/Maildir
namespace {
   prefix = INBOX.
   separator = .
   inbox = yes
}
... is wrong.  Apparently it should be ...
mail_location = maildir:~/INBOX
...which at least seemed to work, although (by that time?) I wound up
re-downloading all mail.
Steve Newcomb
srn at coolheads.com
(Unable to edit the wiki page...  Mysterious question stood in the way,
something like, "How do you prevent spam?"  Evidently I don't know
the correct answer.
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