In the exchange, Rudin and Pascal discuss Angelina Jolie, who seems to have objected to director David Fincher working on Sony's Steve Jobs biopic, rather than overseeing the actress in her forthcoming Cleopatra film, reported E! News.
Earlier this year, it was reported that Jolie and her husband Brad Pitt were planning to co-star in Cleopatra, alongside all six of their children.
In another email, Pascal accused the producer of making threats.
Rudin also attacked Megan Ellison, the film producer daughter of billionaire Larry Ellison.
The leaked documents also include studio's attempt to convince Leonardo DiCaprio to not walk out of Jobs biopic, which eventually changed directors and studio and finally landed with Danny Boyle and Universal.
FBI is investigating the huge hack that has led to the leak of thousands of sensitive files containing personal information about employees, unreleased films, pay cheques of the actors, their phone numbers, social security numbers and other such details, which is now available online.