The Postman Always Rings Twice (1946)

I've never seen this film, so in researching this blurb, I'm trying to avoid spoilers. Therefore, I can really only tell you things I know about the movie (based on a novel by James M. Cain of Mildred Pierce fame, was remade in the 80s starring Jack Nicholson and Jessica Lange); and things I don't know (anything about the plot, whether it's film noir, whether there is, in fact, a postman in the story). The same novel was adapted into a French and Italian film as well as an opera (!), so we can assume that the passions are grand and the narrative arc tragic. It has excellent scores on Metacritic and Rotten Tomatoes, so my anticipation is high! Bring on the 40s fashions and seedy characters!