email is an electronic computer assisted online communication tool. in the business world it is used to transmit virtually every type of correspondence the daily conduct of business requires simple messages memo and letter complex reposts tables of data graphs and charts blueprints pictures pictures you name it if it can be generated by scanned into or downloaded onto a computer it can be electronically sent through cyberspace to another computer it's important to keep your business email short as the easier it is to reply to an email the more likely it is that a business contact will reply quickly. here are both formal and informal email examples as well as important points to remember when writing business email in English.