This document provides guidance on email etiquette. It begins with defining etiquette as rules or expectations for appropriate social behavior. It then discusses email etiquette specifically and some key aspects to consider when writing emails like using formal language for new contacts or business communications. It provides examples of how to structure emails properly with greetings, subject lines, signatures. It also covers topics like using TO, CC, and BCC fields appropriately and maintaining a professional email address and layout. Overall, the document outlines best practices for writing formal and informal emails in a polite, clear and organized manner.