gnus-summary-muttprint-program

gnus-summary-muttprint-program is a variable defined in `gnus-sum.el'.
Its value is

"muttprint"

• This variable may be risky if used as a file-local variable.

Documentation:
Command (and optional arguments) used to run Muttprint.
The value will be updated if you modify it when executing the command
`gnus-summary-muttprint'.

You can customize this variable.

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