Type: boolean
Default: no
If set to ``yes'', mutt will look for a a mailcap entry with the
copiousoutput
flag set for every MIME attachment it
doesn't have an internal viewer defined for. If such an entry is
found, mutt will use the viewer defined in that entry to convert the
body part to text form.
Note: For compatibility with metamail, Mutt will also look at the environment variable MM_NOASK. Setting this to 1 is equivalent to setting implicit_autoview to ``yes''. Otherwise, the value of MM_NOASK is interpreted as a comma-separated list of type names (without white space) for which the corresponding mailcap entries will be used to display MIME parts.