4. Email

 A quick form of communication. It should always be short and simple.

Dos

• Always provide a clear and meaningful subject line.
• Use blind copy feature (bcc), which allow you to show only one address.
• Address other person with salutation like Dear, Sir, Mam etc.
• Before sending an email always check your grammatical mistake, punctuation and spelling mistake.

Don’ts

• Never use CAPITAL words as that means "RUDE".
• Avoid email attachment that contain viruses.
• Some spams are fraud and can be fooled by them.
• Never use your email for any illegal or unethical work.