Email is an important form of communication in the workplace. Companies do have policies on email, though mainly to protect the assets of the company. I’ve rarely seen in an employee’s handbooks etiquette for creating emails.
Email is one dimensional…you can’t see the other person and they can’t see you. What does this mean? It means that whatever you write, the other person will put in their own meaning. This is true even on the phone, yet this form allows the receiver to hear the tone in your voice and to ask additional questions to clarify. In person, they can also see your eyes and how you position your body. This information provides the receiver with additional information.