Custom Media Types

A Custom Media Type is a list of one or more hexadecimal signatures that can identify a sequence of bytes in a specific position within a file. The position is defined by the offset from either the start or end of the file. It defines a list of hexadecimal signatures that Clearswift Gateway looks for when the list is referenced from a Which Media Types clause in the "What To Look For?" section of a content rule.

How do I...

Create a Custom Media Type?

See Creating a Custom Media Type.
Modify a Custom Media Type?

See Modifying a Custom Media Type.
Delete a Custom Media Type?

See Deleting a Custom Media Type.

Custom Media Type detection only applies to attachments that would otherwise have been classified as Unknown Binary. It cannot be used to override the built-in recognition for all the media types that are supported by the Gateways.