The following are the commands understood by mutt.
alias
key address [ , address, ... ]
unalias
key address [ , address, ... ]
alternative_order
mimetype [ mimetype ... ]
auto_view
mimetype [ mimetype ... ]
bind
map key function
color
object foreground background [ regexp ]
folder-hook
pattern command
ignore
pattern [ pattern ... ]
unignore
pattern [ pattern ... ]
hdr_order
header [ header ... ]
unhdr_order
header [ header ... ]
lists
address [ address ... ]
unlists
address [ address ... ]
macro
menu key sequence
mailboxes
filename [ filename ... ]
mono
object attribute [ regexp ]
mbox-hook
pattern mailbox
my_hdr
string
unmy_hdr
field [ field ... ]
push
string
save-hook
regexp filename
send-hook
regexp command
set
[no|inv]variable[=value] [ variable ... ]
toggle
variable [variable ... ]
unset
variable [variable ... ]
source
filename
subscribe
address [ address ... ]
unsubscribe
address [ address ... ]
unhook
hook-type