On Sat 08 Jun 2019 14:30 -0400, Howard Gibson via talk wrote: > Sylpheed and Claws store email in MH (Mail Handler) format. This format is > used by mh and mutt. Mutt can use many different mail formats including mbox, mh and maildir which I personally use. https://linux.die.net/man/5/muttrc "mbox_type"