Mail storage that uses mbox format, (where one mbox file contains many
messages), will not work with notmuch. If that's how your mail is cur‐
rently stored, it is recommended you first convert it to maildir format
Mail storage that uses mbox format, (where one mbox file contains many
messages), will not work with notmuch. If that's how your mail is cur‐
rently stored, it is recommended you first convert it to maildir format