顶级媒体类型
除非指定了子类型,否则 Trend Micro NAS Security™ 将自动包含所有子类型
application/
audio/
image/
text/
video/
application/oda
application/octet-stream
application/postscript
audio/basic
image/g3fax
image/jpeg
image/gif
text/plain
text/richtext
video/mpeg