Strip Mind (2007)

You've got mail! Every time young college student Sam hears the sound of her email box a nightmare begins. Driven by terrifying hallucinations and with no one to trust Sam finds herself on the verge of insanity. Confronted with a mysterious murder she tries to break the hideous circle. The truth, however, becomes even more blurred and reality, phantasms and nightmares draw her into a dark abyss...