##Description CompressMessage is used to compress multipart messages. The component iterates over all message parts adding each one to a zip archive.

The zip entry file names are set by the following logic:

1. The ReceivedFileName context property is used if set on the current message part.
2. Otherwise a guid is used and file name extension is set by:
3. If ContentType it is used to map mime types to file extensions (application/pdf =>.pdf etc. ).
4. If a default file extension is set in the component parameters it is used.
5. Otherwise no file extension is set.

SharpLib zib library is used.

Parameter	Description	Type	Validation
DefaultZipEntryFileExtension	The default file extension to use if no content type is set on the message part.	String	Optional,RegEx pattern [a-zA-Z0-9]{3}