mml-content-type-parameters

mml-content-type-parameters is a variable defined in `mml.el'.
Its value is

(name access-type expiration size permission format)

Documentation:
*A list of acceptable parameters in MML tag.
These parameters are generated in Content-Type header if exists.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.