The correct format of letters

I think the correct format of a letter is as follows:

The first address must be capitalized, and some can also add certain modifiers. Greetings are usually written as "Hello" and "Are you healthy recently", followed by the text. The text is the main body of the letter and can be written in several paragraphs.

General greetings are written as "greetings" and "salutations". Finally, remember to write your signature and date. The signature is the name of the writer, written on the right side of a blank line or two below the greeting. It is best to write the relationship with the recipient before the writer's name, and then write the date on the next line.