To determine which content handler to use for an incoming FTP request, the FTP listening port on Integration Server chooses the content handler based on the file extension of the request. The Integration Server_directory /instances/instance_name/lib/mime.types file contains the mappings of file extension to content type.

You can edit the mappings in the lib/mime.types file from Integration Server Administrator by selecting Settings > Resources > Mime types. For more information about editing the mappings of the lib/mime.types file, see webMethods Service Development Help.