The first line is a bit ominous: "WARNING: Equipment used for screening checked baggage will damage your undeveloped film." This is why you should always take film in your hand luggage. I would expect at least the same level of X-ray intensity on international mail. I suspect that the actual treatment handed out to mailed items will depend on the regulations in force in that particular country...
Originally Posted by sensanjay
One option may be to send via an international carrier such as FedEx. Hopefullt, they will give packages a standard treatment around the globe. From their site: "Edible Materials or Undeveloped Film: When shipping these commodities, you must prominently and legibly mark the package to identify the contents. Special identification labels are available from FedEx". This suggests film will be given special treatment.