Pierre did you follow the link that Roger put up?
It is straight from UL and seems to contradict what they told you.
From the link Roger put up
Effective March 2002, manufacturers of UL Listed "raintight" compression type EMT fittings were required to comply with the more stringent follow up test requirements. If the manufacturers of these fittings did not comply with the new requirements, they were no longer authorized to mark their UL Listed fittings with the "Raintight" marking. Currently (April 2003), no manufacturer is authorized to mark their Listed compression type EMT fittings with the "Raintight" marking.