parameterlengthlimit controls the points at which general content-type and content-disposition parameters are truncated. It defaults to 1024. nameparameterlengthlimit controls the points at which the name content-type and the filename content-disposition parameters are truncated. It defaults to 128. Note that only the outermost message header is processed unless MIME processing is being performed on the message. MIME processing can be enabled in a variety of ways including, but not limited to, the inner keyword or the use of charset conversions.