What are the four main parts of a business letter?

The four main parts of a business letter are the heading, opening, body, and closing. The heading typically includes the sender's address, date, and recipient's address, providing essential information about who is sending the letter and to whom it is addressed. Following the heading, the opening serves to greet the recipient in a polite manner and often includes a brief introduction to the purpose of the letter.

The body is the most substantial part of the letter, where the main message is conveyed. It contains detailed information, requests, or responses that the sender wishes to communicate. Finally, the closing wraps up the correspondence with a courteous conclusion, which may include phrases like "Sincerely" or "Best regards," followed by the sender's name and any relevant titles.

This structure is essential for clear communication in a professional setting, ensuring that the letter is organized and that all necessary information is easily accessible to the recipient.