mh-file-mime-type-substitutions

mh-file-mime-type-substitutions is a variable defined in `mh-mime.el'.
Its value is shown below.

Documentation:
Substitutions to make for Content-Type returned from file command.
The first element is the Content-Type returned by the file command.
The second element is a regexp matching the file name, usually the
extension.
The third element is the Content-Type to replace with.

Value:

(("application/msword" ".xls" "application/ms-excel")
 ("application/msword" ".ppt" "application/ms-powerpoint")
 ("text/plain" ".vcf" "text/x-vcard")
 ("text/rtf" ".rtf" "application/rtf")
 ("application/x-zip" ".sxc" "application/vnd.sun.xml.calc")
 ("application/x-zip" ".sxd" "application/vnd.sun.xml.draw")
 ("application/x-zip" ".sxi" "application/vnd.sun.xml.impress")
 ("application/x-zip" ".sxw" "application/vnd.sun.xml.writer")
 ("application/x-zip" ".odg" "application/vnd.oasis.opendocument.graphics")
 ("application/x-zip" ".odi" "application/vnd.oasis.opendocument.image")
 ("application/x-zip" ".odp" "application/vnd.oasis.opendocument.presentation")
 ("application/x-zip" ".ods" "application/vnd.oasis.opendocument.spreadsheet")
 ("application/x-zip" ".odt" "application/vnd.oasis.opendocument.text"))