Subject: It is a brief statement mentioning the reason for writing the letter. It should be clear, eye catchy, short, simple, and easily understandable. The Greeting: It contains the words to greet the recipient. It is also known as the salutation. The type of salutation depends upon the relationship with the recipient. It generally includes words like Dear, Respected, or just Sir/Madam. A comma (,) usually follow the salutation. The Body Paragraphs: This is the main part of the letter. It contains the actual message of the sender. The main body of the mail must be clear and simple to understand. A body of the letter is basically divided into three main categories.
If you are writing to someone who has a doctorate or medical degree, use the abbreviated form: "Dr." However, for other titles, such as professor, judge, rabbi, etc., write out the full title and capitalize it. For example, your salutation in a letter to a judge would be, "Dear Judge Barnard." Or, if your correspondence was with a rabbi, you might write, "Dear Rabbi Williams."