Mine

set realname='Zac Brown'

set sendmail="/usr/bin/msmtp'

set edit_headers=yes
set folder=~/Mail
set mbox=+mbox
set spoolfile=+inbox
set record=+sent
set postponed=+drafts
set mbox_type=Maildir

mailboxes +inbox +facebook

ignore *
unignore From: To: Cc: Subject: Date: 

set editor=nano