I wouldn ' t ever quit via email . I would tell them to their faces why I was quitting and wouldn ' t mince words , and leave a copy of a written resignation which I would also email to them and their direct managers . If the environment is toxic , I don ' t blame you for leaving . But you shouldn ' t hide behind other issues . Be honest and truthful . It sounds like you quit because of how you were treated and not because of personal circumstances though loss of family is very hard on someone . If anyone questions why you quit , all they have to go on is what you shared in that email . You probably didn ' t detail any of the poor treatment you received from this manager . He will never have any chance of anyone above him seeing that he was the reason an employee left , or have a chance that anyone will look further in to his behavior . And whoever replaces you will definitely be subject to the same unchecked poor treatment .