Business letters are used to communicate with individuals outside of the office. Recipients may include customers, colleagues in other businesses, service providers, professionals who advise the business, government officials and job applicants.
A business letter is usually formatted in block style, in which all of the elements of the letter, except the letterhead, are aligned with the left margin. It can be emailed or delivered by mail. If a letter is sent in the text of an email, the sender includes his name, job title and contact information at the bottom of the email.