muttrc 9 lines (8 with data), 229 Bytes
set mbox_type=Maildir set folder="run/queue" set mask="!^\\.[^.]" set mbox="run/queue" set record="+.Sent" set postponed="+.Drafts" set spoolfile="run/queue" set sendmail="/usr/bin/env lamson sendmail -port 8823 -host 127.0.0.1"