Electronic mail (e-mail) allows for the almost instantaneous transmission of a message from one computer through a network to one or more other computers and is rapidly becoming one of the main forms of both professional and personal communication.
Like a telephone conversation, e-mail is immediate and informal. Like a memorandum, it is more precise than an oral conversation, it provides a record of the communication, and it can send a single message to a large number of people.
Unlike telephone conversations or memoranda, e-mail should not be considered private. E-mail is sent through public networks where messages are often copied multiple times during transmission.
Whereas the basic unit of a memorandum is the single 8½-by-11-inch page, the basic unit of an e-mail is the 22-line screen. Consequently, e-mails should be kept short and concise. Finally, because e-mails are generated so easily, many individuals receive scores of messages every day.
Avoid using all capital letters.
Do not forward an e-mail without permission.
Keep e-mail addresses confidential.