Email: Netiquette

Do not use different types of fonts, colours, clip art and other graphics in email. Such an approach merely clutters your message and takes longer to send and receive
Do not key the message in all uppercase letters. You may emphasise a word or phrase in all capital letters, but use the Caps Lock button sparingly
Avoid sending messages when you are angry. Give yourself time to cool down and think about the situation before you send or reply to an email in anger. Take a walk around the office, drink a cup of tea to soothe your nerves or wait 24 hours to respond. In some cases, you may want to make a telephone call or have a personal conversation with the person. You have a more difficult time being angry when you see the person face-to-face or when you hear the person’s voice
Answer emails promptly. The general rule is to read and respond to email once or twice a day (depending on volume)
Do not send large attachments unless you know the person can receive them