On 2020-09-23 04:07, Chris Green wrote:
I think I might try that second idea, I can run mb2md (as you say) 2354 times and get the layout I want. Then I can try mutt on it and see if it's practical.
Does mb2md convert message attributes? (Message has been read, message has been replied to, etc.)
In mbox files, I believe Mutt stores that stuff in the common but non-standard headers Status:, X-Status:, and X-Label:. Maildir instead encodes much of that in message pathnames. Basic maildir has no way to encode labels/keywords, but Dovecot has added its own mechanism for that. I don't know how Mutt stores labels in maildir.