mml-tweak-type-alist

mml-tweak-type-alist is a variable defined in `mml.el'.
Its value is

nil

Documentation:
A list of (TYPE . FUNCTION) for tweaking MML parts.
TYPE is a string containing a regexp to match the MIME type. FUNCTION
is a Lisp function which is called with the MML handle to tweak the
part. This variable is used only when no TWEAK parameter exists in
the MML handle.