The style of punctuation that uses no punctuation after the greeting and closing line is called?

The style of punctuation that uses no punctuation after the greeting and closing line is known as open punctuation. This form is commonly used in modern business correspondence as it conveys a more contemporary and streamlined approach. In this style, there are no commas or periods following the salutation (e.g., "Dear John") or the closing (e.g., "Sincerely") in a letter. Open punctuation emphasizes clarity and simplicity, making it easier for readers to process the information quickly.

In contrast, closed punctuation uses a comma after both the greeting and closing lines, which can make the text appear more formal. Standard punctuation refers to the conventional use of punctuation in various contexts, which often includes the use of comma placements similar to those in closed punctuation. Minimal punctuation, while it may imply a reduced use of punctuation overall, does not specifically indicate the absence of punctuation in greetings and closings, making open punctuation the precise and correct choice for the question asked.