Email is rapidly becoming the communication medium of choice in business. It gives directions, dates, information by Yahoo, Gmail, or any other mail server, you can reach milestones in building new business relationships.
Don't use Caps Lock for the entire sentence as it shows that you are shouting. Use proper fonts and avoid colorful designs. Signatures are always attached to messages in business and its simple.
Some points must be considered in business aids:
1. Grammar and Punctuation
2. Quoting
3. Chat language and humor
4. Use subject line
5. Limit the length of the message