mhshow-suffix-application/vnd.ms-excel: .xll
mhshow-suffix-application/vnd.ms-excel: .xlm
mhshow-suffix-application/vnd.ms-excel: .xls
+mhshow-suffix-application/vnd.openxmlformats-officedocument.spreadsheetml.sheet: .xlsx
mhshow-suffix-application/vnd.ms-excel: .xlt
mhshow-suffix-application/vnd.ms-excel: .xlw
mhshow-suffix-application/vnd.ms-powerpoint: .pot